Speculation, please?
12-01-2003, 01:51 PM
#11
Guest
Posts: n/a
Re: Speculation, please?
On Mon, 01 Dec 2003 13:37:55 -0500, travis
<travist34removethis@hotmail.com> shared the following:
>On Mon, 1 Dec 2003 12:54:45 -0500, "Joe" <me@privacy.net
>(jo_ratner@yahoo.com)> shared the following:
>
>>Does it sound like a backfire?
>
>A little bit... Just got home and looked and don't see any burn marks
>on the air cleaner.
Oh, and it did it again on the way home. It seems like it does it
soon after getting on the highway like it's not quite up to good
operating temperature yet. By the time I've run at 60+ mph for a
couple of minutes the problem seems to go away. Also I noticed I
could feel a very slight "pulse" on my right foot that was on the gas
pedal each time the bang noise occurred, but could not feel that same
pulse on my left foot... which makes me think the carb is somehow
involved here, like it's backfiring through it maybe. Still not sure
at all.
>
>>
>>"travis" <travist34removethis@hotmail.com> wrote in message
>>news:f5vmsvstc3ggcrdu8od070q4ehsnk91bbg@4ax.com. ..
>>> I'm worried about my CJ5. Yesterday while driving home from the
>>> trails I got out on the highway and got up to about 75 mph in a hurry
>>> to merge, then slowed down to about 65. Maybe 30 seconds later
>>> several LOUD bangs/knocks (about 10-15 maybe) came from what sounded
>>> like under the hood. With each bang there was a dramatic power drop
>>> for a fraction of a second. This happened really quickly like within
>>> 25-30 seconds or so. I let off on the gas and it seemed to help a
>>> little bit. Each time I'd ease back on the gas the bangs would
>>> return. I slowed down to about 50 mph and the banging sound went
>>> away. I slowly sped back up to about 60 mph and made it the rest of
>>> the way home without incident. I noticed when this all was happening
>>> that my oil pressure stayed steady and my water temp was also steady.
>>> Then... when I was driving to work this morning I heard 3-4 loud
>>> bangs within less than 10 seconds while driving at about 65 mph on the
>>> highway. I felt the same power drop and again noticed oil pressure
>>> and temp remained unchanged. The problem "went away" again. I'm
>>> thinking maybe it's backfiring through the carb (I'll check for burn
>>> marks around the air cleaner later today) or maybe...just maybe...I
>>> seem to recall a similar feel/sound from about 12-13 years ago when an
>>> old Pontiac I had did something like this... turned out it had a
>>> couple of lifters that were about to give up the ghost, or pretty much
>>> had given up the ghost by the time I opened up the motor and replaced
>>> them. Can y'all speculate on best-case/worst-case scenarios? Sorry I
>>> can't give a better description of the sound. Ideas of stuff for me
>>> to look at? Thank you in advance for input.
>>>
>>>
>>> --
>>> Travis
>>> http://jeepadventures.dyndns.org/jeep.html
>>> Happy trails!!!
>>> :wq!
>>
--
Travis
http://jeepadventures.dyndns.org/jeep.html
Happy trails!!!
:wq!
<travist34removethis@hotmail.com> shared the following:
>On Mon, 1 Dec 2003 12:54:45 -0500, "Joe" <me@privacy.net
>(jo_ratner@yahoo.com)> shared the following:
>
>>Does it sound like a backfire?
>
>A little bit... Just got home and looked and don't see any burn marks
>on the air cleaner.
Oh, and it did it again on the way home. It seems like it does it
soon after getting on the highway like it's not quite up to good
operating temperature yet. By the time I've run at 60+ mph for a
couple of minutes the problem seems to go away. Also I noticed I
could feel a very slight "pulse" on my right foot that was on the gas
pedal each time the bang noise occurred, but could not feel that same
pulse on my left foot... which makes me think the carb is somehow
involved here, like it's backfiring through it maybe. Still not sure
at all.
>
>>
>>"travis" <travist34removethis@hotmail.com> wrote in message
>>news:f5vmsvstc3ggcrdu8od070q4ehsnk91bbg@4ax.com. ..
>>> I'm worried about my CJ5. Yesterday while driving home from the
>>> trails I got out on the highway and got up to about 75 mph in a hurry
>>> to merge, then slowed down to about 65. Maybe 30 seconds later
>>> several LOUD bangs/knocks (about 10-15 maybe) came from what sounded
>>> like under the hood. With each bang there was a dramatic power drop
>>> for a fraction of a second. This happened really quickly like within
>>> 25-30 seconds or so. I let off on the gas and it seemed to help a
>>> little bit. Each time I'd ease back on the gas the bangs would
>>> return. I slowed down to about 50 mph and the banging sound went
>>> away. I slowly sped back up to about 60 mph and made it the rest of
>>> the way home without incident. I noticed when this all was happening
>>> that my oil pressure stayed steady and my water temp was also steady.
>>> Then... when I was driving to work this morning I heard 3-4 loud
>>> bangs within less than 10 seconds while driving at about 65 mph on the
>>> highway. I felt the same power drop and again noticed oil pressure
>>> and temp remained unchanged. The problem "went away" again. I'm
>>> thinking maybe it's backfiring through the carb (I'll check for burn
>>> marks around the air cleaner later today) or maybe...just maybe...I
>>> seem to recall a similar feel/sound from about 12-13 years ago when an
>>> old Pontiac I had did something like this... turned out it had a
>>> couple of lifters that were about to give up the ghost, or pretty much
>>> had given up the ghost by the time I opened up the motor and replaced
>>> them. Can y'all speculate on best-case/worst-case scenarios? Sorry I
>>> can't give a better description of the sound. Ideas of stuff for me
>>> to look at? Thank you in advance for input.
>>>
>>>
>>> --
>>> Travis
>>> http://jeepadventures.dyndns.org/jeep.html
>>> Happy trails!!!
>>> :wq!
>>
--
Travis
http://jeepadventures.dyndns.org/jeep.html
Happy trails!!!
:wq!
12-01-2003, 01:51 PM
#12
Guest
Posts: n/a
Re: Speculation, please?
On Mon, 01 Dec 2003 13:37:55 -0500, travis
<travist34removethis@hotmail.com> shared the following:
>On Mon, 1 Dec 2003 12:54:45 -0500, "Joe" <me@privacy.net
>(jo_ratner@yahoo.com)> shared the following:
>
>>Does it sound like a backfire?
>
>A little bit... Just got home and looked and don't see any burn marks
>on the air cleaner.
Oh, and it did it again on the way home. It seems like it does it
soon after getting on the highway like it's not quite up to good
operating temperature yet. By the time I've run at 60+ mph for a
couple of minutes the problem seems to go away. Also I noticed I
could feel a very slight "pulse" on my right foot that was on the gas
pedal each time the bang noise occurred, but could not feel that same
pulse on my left foot... which makes me think the carb is somehow
involved here, like it's backfiring through it maybe. Still not sure
at all.
>
>>
>>"travis" <travist34removethis@hotmail.com> wrote in message
>>news:f5vmsvstc3ggcrdu8od070q4ehsnk91bbg@4ax.com. ..
>>> I'm worried about my CJ5. Yesterday while driving home from the
>>> trails I got out on the highway and got up to about 75 mph in a hurry
>>> to merge, then slowed down to about 65. Maybe 30 seconds later
>>> several LOUD bangs/knocks (about 10-15 maybe) came from what sounded
>>> like under the hood. With each bang there was a dramatic power drop
>>> for a fraction of a second. This happened really quickly like within
>>> 25-30 seconds or so. I let off on the gas and it seemed to help a
>>> little bit. Each time I'd ease back on the gas the bangs would
>>> return. I slowed down to about 50 mph and the banging sound went
>>> away. I slowly sped back up to about 60 mph and made it the rest of
>>> the way home without incident. I noticed when this all was happening
>>> that my oil pressure stayed steady and my water temp was also steady.
>>> Then... when I was driving to work this morning I heard 3-4 loud
>>> bangs within less than 10 seconds while driving at about 65 mph on the
>>> highway. I felt the same power drop and again noticed oil pressure
>>> and temp remained unchanged. The problem "went away" again. I'm
>>> thinking maybe it's backfiring through the carb (I'll check for burn
>>> marks around the air cleaner later today) or maybe...just maybe...I
>>> seem to recall a similar feel/sound from about 12-13 years ago when an
>>> old Pontiac I had did something like this... turned out it had a
>>> couple of lifters that were about to give up the ghost, or pretty much
>>> had given up the ghost by the time I opened up the motor and replaced
>>> them. Can y'all speculate on best-case/worst-case scenarios? Sorry I
>>> can't give a better description of the sound. Ideas of stuff for me
>>> to look at? Thank you in advance for input.
>>>
>>>
>>> --
>>> Travis
>>> http://jeepadventures.dyndns.org/jeep.html
>>> Happy trails!!!
>>> :wq!
>>
--
Travis
http://jeepadventures.dyndns.org/jeep.html
Happy trails!!!
:wq!
<travist34removethis@hotmail.com> shared the following:
>On Mon, 1 Dec 2003 12:54:45 -0500, "Joe" <me@privacy.net
>(jo_ratner@yahoo.com)> shared the following:
>
>>Does it sound like a backfire?
>
>A little bit... Just got home and looked and don't see any burn marks
>on the air cleaner.
Oh, and it did it again on the way home. It seems like it does it
soon after getting on the highway like it's not quite up to good
operating temperature yet. By the time I've run at 60+ mph for a
couple of minutes the problem seems to go away. Also I noticed I
could feel a very slight "pulse" on my right foot that was on the gas
pedal each time the bang noise occurred, but could not feel that same
pulse on my left foot... which makes me think the carb is somehow
involved here, like it's backfiring through it maybe. Still not sure
at all.
>
>>
>>"travis" <travist34removethis@hotmail.com> wrote in message
>>news:f5vmsvstc3ggcrdu8od070q4ehsnk91bbg@4ax.com. ..
>>> I'm worried about my CJ5. Yesterday while driving home from the
>>> trails I got out on the highway and got up to about 75 mph in a hurry
>>> to merge, then slowed down to about 65. Maybe 30 seconds later
>>> several LOUD bangs/knocks (about 10-15 maybe) came from what sounded
>>> like under the hood. With each bang there was a dramatic power drop
>>> for a fraction of a second. This happened really quickly like within
>>> 25-30 seconds or so. I let off on the gas and it seemed to help a
>>> little bit. Each time I'd ease back on the gas the bangs would
>>> return. I slowed down to about 50 mph and the banging sound went
>>> away. I slowly sped back up to about 60 mph and made it the rest of
>>> the way home without incident. I noticed when this all was happening
>>> that my oil pressure stayed steady and my water temp was also steady.
>>> Then... when I was driving to work this morning I heard 3-4 loud
>>> bangs within less than 10 seconds while driving at about 65 mph on the
>>> highway. I felt the same power drop and again noticed oil pressure
>>> and temp remained unchanged. The problem "went away" again. I'm
>>> thinking maybe it's backfiring through the carb (I'll check for burn
>>> marks around the air cleaner later today) or maybe...just maybe...I
>>> seem to recall a similar feel/sound from about 12-13 years ago when an
>>> old Pontiac I had did something like this... turned out it had a
>>> couple of lifters that were about to give up the ghost, or pretty much
>>> had given up the ghost by the time I opened up the motor and replaced
>>> them. Can y'all speculate on best-case/worst-case scenarios? Sorry I
>>> can't give a better description of the sound. Ideas of stuff for me
>>> to look at? Thank you in advance for input.
>>>
>>>
>>> --
>>> Travis
>>> http://jeepadventures.dyndns.org/jeep.html
>>> Happy trails!!!
>>> :wq!
>>
--
Travis
http://jeepadventures.dyndns.org/jeep.html
Happy trails!!!
:wq!
12-01-2003, 01:51 PM
#13
Guest
Posts: n/a
Re: Speculation, please?
On Mon, 01 Dec 2003 13:37:55 -0500, travis
<travist34removethis@hotmail.com> shared the following:
>On Mon, 1 Dec 2003 12:54:45 -0500, "Joe" <me@privacy.net
>(jo_ratner@yahoo.com)> shared the following:
>
>>Does it sound like a backfire?
>
>A little bit... Just got home and looked and don't see any burn marks
>on the air cleaner.
Oh, and it did it again on the way home. It seems like it does it
soon after getting on the highway like it's not quite up to good
operating temperature yet. By the time I've run at 60+ mph for a
couple of minutes the problem seems to go away. Also I noticed I
could feel a very slight "pulse" on my right foot that was on the gas
pedal each time the bang noise occurred, but could not feel that same
pulse on my left foot... which makes me think the carb is somehow
involved here, like it's backfiring through it maybe. Still not sure
at all.
>
>>
>>"travis" <travist34removethis@hotmail.com> wrote in message
>>news:f5vmsvstc3ggcrdu8od070q4ehsnk91bbg@4ax.com. ..
>>> I'm worried about my CJ5. Yesterday while driving home from the
>>> trails I got out on the highway and got up to about 75 mph in a hurry
>>> to merge, then slowed down to about 65. Maybe 30 seconds later
>>> several LOUD bangs/knocks (about 10-15 maybe) came from what sounded
>>> like under the hood. With each bang there was a dramatic power drop
>>> for a fraction of a second. This happened really quickly like within
>>> 25-30 seconds or so. I let off on the gas and it seemed to help a
>>> little bit. Each time I'd ease back on the gas the bangs would
>>> return. I slowed down to about 50 mph and the banging sound went
>>> away. I slowly sped back up to about 60 mph and made it the rest of
>>> the way home without incident. I noticed when this all was happening
>>> that my oil pressure stayed steady and my water temp was also steady.
>>> Then... when I was driving to work this morning I heard 3-4 loud
>>> bangs within less than 10 seconds while driving at about 65 mph on the
>>> highway. I felt the same power drop and again noticed oil pressure
>>> and temp remained unchanged. The problem "went away" again. I'm
>>> thinking maybe it's backfiring through the carb (I'll check for burn
>>> marks around the air cleaner later today) or maybe...just maybe...I
>>> seem to recall a similar feel/sound from about 12-13 years ago when an
>>> old Pontiac I had did something like this... turned out it had a
>>> couple of lifters that were about to give up the ghost, or pretty much
>>> had given up the ghost by the time I opened up the motor and replaced
>>> them. Can y'all speculate on best-case/worst-case scenarios? Sorry I
>>> can't give a better description of the sound. Ideas of stuff for me
>>> to look at? Thank you in advance for input.
>>>
>>>
>>> --
>>> Travis
>>> http://jeepadventures.dyndns.org/jeep.html
>>> Happy trails!!!
>>> :wq!
>>
--
Travis
http://jeepadventures.dyndns.org/jeep.html
Happy trails!!!
:wq!
<travist34removethis@hotmail.com> shared the following:
>On Mon, 1 Dec 2003 12:54:45 -0500, "Joe" <me@privacy.net
>(jo_ratner@yahoo.com)> shared the following:
>
>>Does it sound like a backfire?
>
>A little bit... Just got home and looked and don't see any burn marks
>on the air cleaner.
Oh, and it did it again on the way home. It seems like it does it
soon after getting on the highway like it's not quite up to good
operating temperature yet. By the time I've run at 60+ mph for a
couple of minutes the problem seems to go away. Also I noticed I
could feel a very slight "pulse" on my right foot that was on the gas
pedal each time the bang noise occurred, but could not feel that same
pulse on my left foot... which makes me think the carb is somehow
involved here, like it's backfiring through it maybe. Still not sure
at all.
>
>>
>>"travis" <travist34removethis@hotmail.com> wrote in message
>>news:f5vmsvstc3ggcrdu8od070q4ehsnk91bbg@4ax.com. ..
>>> I'm worried about my CJ5. Yesterday while driving home from the
>>> trails I got out on the highway and got up to about 75 mph in a hurry
>>> to merge, then slowed down to about 65. Maybe 30 seconds later
>>> several LOUD bangs/knocks (about 10-15 maybe) came from what sounded
>>> like under the hood. With each bang there was a dramatic power drop
>>> for a fraction of a second. This happened really quickly like within
>>> 25-30 seconds or so. I let off on the gas and it seemed to help a
>>> little bit. Each time I'd ease back on the gas the bangs would
>>> return. I slowed down to about 50 mph and the banging sound went
>>> away. I slowly sped back up to about 60 mph and made it the rest of
>>> the way home without incident. I noticed when this all was happening
>>> that my oil pressure stayed steady and my water temp was also steady.
>>> Then... when I was driving to work this morning I heard 3-4 loud
>>> bangs within less than 10 seconds while driving at about 65 mph on the
>>> highway. I felt the same power drop and again noticed oil pressure
>>> and temp remained unchanged. The problem "went away" again. I'm
>>> thinking maybe it's backfiring through the carb (I'll check for burn
>>> marks around the air cleaner later today) or maybe...just maybe...I
>>> seem to recall a similar feel/sound from about 12-13 years ago when an
>>> old Pontiac I had did something like this... turned out it had a
>>> couple of lifters that were about to give up the ghost, or pretty much
>>> had given up the ghost by the time I opened up the motor and replaced
>>> them. Can y'all speculate on best-case/worst-case scenarios? Sorry I
>>> can't give a better description of the sound. Ideas of stuff for me
>>> to look at? Thank you in advance for input.
>>>
>>>
>>> --
>>> Travis
>>> http://jeepadventures.dyndns.org/jeep.html
>>> Happy trails!!!
>>> :wq!
>>
--
Travis
http://jeepadventures.dyndns.org/jeep.html
Happy trails!!!
:wq!
12-01-2003, 04:43 PM
#14
Guest
Posts: n/a
Re: Speculation, please?
On Mon, 01 Dec 2003 17:48:30 GMT, "c" <c@me.org> shared the
following:
>
>
>"travis" <travist34removethis@hotmail.com> wrote in message
>news:f5vmsvstc3ggcrdu8od070q4ehsnk91bbg@4ax.com.. .
>> I'm worried about my CJ5. Yesterday while driving home from the
>> trails I got out on the highway and got up to about 75 mph in a hurry
>> to merge, then slowed down to about 65. Maybe 30 seconds later
>> several LOUD bangs/knocks (about 10-15 maybe) came from what sounded
>> like under the hood. With each bang there was a dramatic power drop
>> for a fraction of a second. This happened really quickly like within
>> 25-30 seconds or so. I let off on the gas and it seemed to help a
>> little bit. Each time I'd ease back on the gas the bangs would
>> return. I slowed down to about 50 mph and the banging sound went
>> away. I slowly sped back up to about 60 mph and made it the rest of
>> the way home without incident. I noticed when this all was happening
>> that my oil pressure stayed steady and my water temp was also steady.
>> Then... when I was driving to work this morning I heard 3-4 loud
>> bangs within less than 10 seconds while driving at about 65 mph on the
>> highway. I felt the same power drop and again noticed oil pressure
>> and temp remained unchanged. The problem "went away" again. I'm
>> thinking maybe it's backfiring through the carb (I'll check for burn
>> marks around the air cleaner later today) or maybe...just maybe...I
>> seem to recall a similar feel/sound from about 12-13 years ago when an
>> old Pontiac I had did something like this... turned out it had a
>> couple of lifters that were about to give up the ghost, or pretty much
>> had given up the ghost by the time I opened up the motor and replaced
>> them. Can y'all speculate on best-case/worst-case scenarios? Sorry I
>> can't give a better description of the sound. Ideas of stuff for me
>> to look at? Thank you in advance for input.
>>
>>
>> --
>> Travis
>> http://jeepadventures.dyndns.org/jeep.html
>> Happy trails!!!
>> :wq!
>
>Could be lean fuel mixture, late ignition timing, broken valve spring, or a
>cam lobe going bad. I'm sure there are others, but this is a start.
>
>Chris
>
Could any of those things you listed "come and go," though? If it was
lean, wouldn't it be lean all of the time? Late ignition
timing...hmm...maybe an intermittent vacuum leak causing the
distributor to not advance when it should? Hmm... Broken valve
spring? I can't see that causing this problem to show itself for 30
seconds and then let me drive it 1/2 hour without showing up again.
Cam lobe going bad? I also think that would be a more persistent
problem than what I'm seeing. I like the late ignition timing idea,
though. I'll have to poke around and look for a vacuum leak. Thanks!
--
Travis
http://jeepadventures.dyndns.org/jeep.html
Happy trails!!!
:wq!
following:
>
>
>"travis" <travist34removethis@hotmail.com> wrote in message
>news:f5vmsvstc3ggcrdu8od070q4ehsnk91bbg@4ax.com.. .
>> I'm worried about my CJ5. Yesterday while driving home from the
>> trails I got out on the highway and got up to about 75 mph in a hurry
>> to merge, then slowed down to about 65. Maybe 30 seconds later
>> several LOUD bangs/knocks (about 10-15 maybe) came from what sounded
>> like under the hood. With each bang there was a dramatic power drop
>> for a fraction of a second. This happened really quickly like within
>> 25-30 seconds or so. I let off on the gas and it seemed to help a
>> little bit. Each time I'd ease back on the gas the bangs would
>> return. I slowed down to about 50 mph and the banging sound went
>> away. I slowly sped back up to about 60 mph and made it the rest of
>> the way home without incident. I noticed when this all was happening
>> that my oil pressure stayed steady and my water temp was also steady.
>> Then... when I was driving to work this morning I heard 3-4 loud
>> bangs within less than 10 seconds while driving at about 65 mph on the
>> highway. I felt the same power drop and again noticed oil pressure
>> and temp remained unchanged. The problem "went away" again. I'm
>> thinking maybe it's backfiring through the carb (I'll check for burn
>> marks around the air cleaner later today) or maybe...just maybe...I
>> seem to recall a similar feel/sound from about 12-13 years ago when an
>> old Pontiac I had did something like this... turned out it had a
>> couple of lifters that were about to give up the ghost, or pretty much
>> had given up the ghost by the time I opened up the motor and replaced
>> them. Can y'all speculate on best-case/worst-case scenarios? Sorry I
>> can't give a better description of the sound. Ideas of stuff for me
>> to look at? Thank you in advance for input.
>>
>>
>> --
>> Travis
>> http://jeepadventures.dyndns.org/jeep.html
>> Happy trails!!!
>> :wq!
>
>Could be lean fuel mixture, late ignition timing, broken valve spring, or a
>cam lobe going bad. I'm sure there are others, but this is a start.
>
>Chris
>
Could any of those things you listed "come and go," though? If it was
lean, wouldn't it be lean all of the time? Late ignition
timing...hmm...maybe an intermittent vacuum leak causing the
distributor to not advance when it should? Hmm... Broken valve
spring? I can't see that causing this problem to show itself for 30
seconds and then let me drive it 1/2 hour without showing up again.
Cam lobe going bad? I also think that would be a more persistent
problem than what I'm seeing. I like the late ignition timing idea,
though. I'll have to poke around and look for a vacuum leak. Thanks!
--
Travis
http://jeepadventures.dyndns.org/jeep.html
Happy trails!!!
:wq!
12-01-2003, 04:43 PM
#15
Guest
Posts: n/a
Re: Speculation, please?
On Mon, 01 Dec 2003 17:48:30 GMT, "c" <c@me.org> shared the
following:
>
>
>"travis" <travist34removethis@hotmail.com> wrote in message
>news:f5vmsvstc3ggcrdu8od070q4ehsnk91bbg@4ax.com.. .
>> I'm worried about my CJ5. Yesterday while driving home from the
>> trails I got out on the highway and got up to about 75 mph in a hurry
>> to merge, then slowed down to about 65. Maybe 30 seconds later
>> several LOUD bangs/knocks (about 10-15 maybe) came from what sounded
>> like under the hood. With each bang there was a dramatic power drop
>> for a fraction of a second. This happened really quickly like within
>> 25-30 seconds or so. I let off on the gas and it seemed to help a
>> little bit. Each time I'd ease back on the gas the bangs would
>> return. I slowed down to about 50 mph and the banging sound went
>> away. I slowly sped back up to about 60 mph and made it the rest of
>> the way home without incident. I noticed when this all was happening
>> that my oil pressure stayed steady and my water temp was also steady.
>> Then... when I was driving to work this morning I heard 3-4 loud
>> bangs within less than 10 seconds while driving at about 65 mph on the
>> highway. I felt the same power drop and again noticed oil pressure
>> and temp remained unchanged. The problem "went away" again. I'm
>> thinking maybe it's backfiring through the carb (I'll check for burn
>> marks around the air cleaner later today) or maybe...just maybe...I
>> seem to recall a similar feel/sound from about 12-13 years ago when an
>> old Pontiac I had did something like this... turned out it had a
>> couple of lifters that were about to give up the ghost, or pretty much
>> had given up the ghost by the time I opened up the motor and replaced
>> them. Can y'all speculate on best-case/worst-case scenarios? Sorry I
>> can't give a better description of the sound. Ideas of stuff for me
>> to look at? Thank you in advance for input.
>>
>>
>> --
>> Travis
>> http://jeepadventures.dyndns.org/jeep.html
>> Happy trails!!!
>> :wq!
>
>Could be lean fuel mixture, late ignition timing, broken valve spring, or a
>cam lobe going bad. I'm sure there are others, but this is a start.
>
>Chris
>
Could any of those things you listed "come and go," though? If it was
lean, wouldn't it be lean all of the time? Late ignition
timing...hmm...maybe an intermittent vacuum leak causing the
distributor to not advance when it should? Hmm... Broken valve
spring? I can't see that causing this problem to show itself for 30
seconds and then let me drive it 1/2 hour without showing up again.
Cam lobe going bad? I also think that would be a more persistent
problem than what I'm seeing. I like the late ignition timing idea,
though. I'll have to poke around and look for a vacuum leak. Thanks!
--
Travis
http://jeepadventures.dyndns.org/jeep.html
Happy trails!!!
:wq!
following:
>
>
>"travis" <travist34removethis@hotmail.com> wrote in message
>news:f5vmsvstc3ggcrdu8od070q4ehsnk91bbg@4ax.com.. .
>> I'm worried about my CJ5. Yesterday while driving home from the
>> trails I got out on the highway and got up to about 75 mph in a hurry
>> to merge, then slowed down to about 65. Maybe 30 seconds later
>> several LOUD bangs/knocks (about 10-15 maybe) came from what sounded
>> like under the hood. With each bang there was a dramatic power drop
>> for a fraction of a second. This happened really quickly like within
>> 25-30 seconds or so. I let off on the gas and it seemed to help a
>> little bit. Each time I'd ease back on the gas the bangs would
>> return. I slowed down to about 50 mph and the banging sound went
>> away. I slowly sped back up to about 60 mph and made it the rest of
>> the way home without incident. I noticed when this all was happening
>> that my oil pressure stayed steady and my water temp was also steady.
>> Then... when I was driving to work this morning I heard 3-4 loud
>> bangs within less than 10 seconds while driving at about 65 mph on the
>> highway. I felt the same power drop and again noticed oil pressure
>> and temp remained unchanged. The problem "went away" again. I'm
>> thinking maybe it's backfiring through the carb (I'll check for burn
>> marks around the air cleaner later today) or maybe...just maybe...I
>> seem to recall a similar feel/sound from about 12-13 years ago when an
>> old Pontiac I had did something like this... turned out it had a
>> couple of lifters that were about to give up the ghost, or pretty much
>> had given up the ghost by the time I opened up the motor and replaced
>> them. Can y'all speculate on best-case/worst-case scenarios? Sorry I
>> can't give a better description of the sound. Ideas of stuff for me
>> to look at? Thank you in advance for input.
>>
>>
>> --
>> Travis
>> http://jeepadventures.dyndns.org/jeep.html
>> Happy trails!!!
>> :wq!
>
>Could be lean fuel mixture, late ignition timing, broken valve spring, or a
>cam lobe going bad. I'm sure there are others, but this is a start.
>
>Chris
>
Could any of those things you listed "come and go," though? If it was
lean, wouldn't it be lean all of the time? Late ignition
timing...hmm...maybe an intermittent vacuum leak causing the
distributor to not advance when it should? Hmm... Broken valve
spring? I can't see that causing this problem to show itself for 30
seconds and then let me drive it 1/2 hour without showing up again.
Cam lobe going bad? I also think that would be a more persistent
problem than what I'm seeing. I like the late ignition timing idea,
though. I'll have to poke around and look for a vacuum leak. Thanks!
--
Travis
http://jeepadventures.dyndns.org/jeep.html
Happy trails!!!
:wq!
12-01-2003, 04:43 PM
#16
Guest
Posts: n/a
Re: Speculation, please?
On Mon, 01 Dec 2003 17:48:30 GMT, "c" <c@me.org> shared the
following:
>
>
>"travis" <travist34removethis@hotmail.com> wrote in message
>news:f5vmsvstc3ggcrdu8od070q4ehsnk91bbg@4ax.com.. .
>> I'm worried about my CJ5. Yesterday while driving home from the
>> trails I got out on the highway and got up to about 75 mph in a hurry
>> to merge, then slowed down to about 65. Maybe 30 seconds later
>> several LOUD bangs/knocks (about 10-15 maybe) came from what sounded
>> like under the hood. With each bang there was a dramatic power drop
>> for a fraction of a second. This happened really quickly like within
>> 25-30 seconds or so. I let off on the gas and it seemed to help a
>> little bit. Each time I'd ease back on the gas the bangs would
>> return. I slowed down to about 50 mph and the banging sound went
>> away. I slowly sped back up to about 60 mph and made it the rest of
>> the way home without incident. I noticed when this all was happening
>> that my oil pressure stayed steady and my water temp was also steady.
>> Then... when I was driving to work this morning I heard 3-4 loud
>> bangs within less than 10 seconds while driving at about 65 mph on the
>> highway. I felt the same power drop and again noticed oil pressure
>> and temp remained unchanged. The problem "went away" again. I'm
>> thinking maybe it's backfiring through the carb (I'll check for burn
>> marks around the air cleaner later today) or maybe...just maybe...I
>> seem to recall a similar feel/sound from about 12-13 years ago when an
>> old Pontiac I had did something like this... turned out it had a
>> couple of lifters that were about to give up the ghost, or pretty much
>> had given up the ghost by the time I opened up the motor and replaced
>> them. Can y'all speculate on best-case/worst-case scenarios? Sorry I
>> can't give a better description of the sound. Ideas of stuff for me
>> to look at? Thank you in advance for input.
>>
>>
>> --
>> Travis
>> http://jeepadventures.dyndns.org/jeep.html
>> Happy trails!!!
>> :wq!
>
>Could be lean fuel mixture, late ignition timing, broken valve spring, or a
>cam lobe going bad. I'm sure there are others, but this is a start.
>
>Chris
>
Could any of those things you listed "come and go," though? If it was
lean, wouldn't it be lean all of the time? Late ignition
timing...hmm...maybe an intermittent vacuum leak causing the
distributor to not advance when it should? Hmm... Broken valve
spring? I can't see that causing this problem to show itself for 30
seconds and then let me drive it 1/2 hour without showing up again.
Cam lobe going bad? I also think that would be a more persistent
problem than what I'm seeing. I like the late ignition timing idea,
though. I'll have to poke around and look for a vacuum leak. Thanks!
--
Travis
http://jeepadventures.dyndns.org/jeep.html
Happy trails!!!
:wq!
following:
>
>
>"travis" <travist34removethis@hotmail.com> wrote in message
>news:f5vmsvstc3ggcrdu8od070q4ehsnk91bbg@4ax.com.. .
>> I'm worried about my CJ5. Yesterday while driving home from the
>> trails I got out on the highway and got up to about 75 mph in a hurry
>> to merge, then slowed down to about 65. Maybe 30 seconds later
>> several LOUD bangs/knocks (about 10-15 maybe) came from what sounded
>> like under the hood. With each bang there was a dramatic power drop
>> for a fraction of a second. This happened really quickly like within
>> 25-30 seconds or so. I let off on the gas and it seemed to help a
>> little bit. Each time I'd ease back on the gas the bangs would
>> return. I slowed down to about 50 mph and the banging sound went
>> away. I slowly sped back up to about 60 mph and made it the rest of
>> the way home without incident. I noticed when this all was happening
>> that my oil pressure stayed steady and my water temp was also steady.
>> Then... when I was driving to work this morning I heard 3-4 loud
>> bangs within less than 10 seconds while driving at about 65 mph on the
>> highway. I felt the same power drop and again noticed oil pressure
>> and temp remained unchanged. The problem "went away" again. I'm
>> thinking maybe it's backfiring through the carb (I'll check for burn
>> marks around the air cleaner later today) or maybe...just maybe...I
>> seem to recall a similar feel/sound from about 12-13 years ago when an
>> old Pontiac I had did something like this... turned out it had a
>> couple of lifters that were about to give up the ghost, or pretty much
>> had given up the ghost by the time I opened up the motor and replaced
>> them. Can y'all speculate on best-case/worst-case scenarios? Sorry I
>> can't give a better description of the sound. Ideas of stuff for me
>> to look at? Thank you in advance for input.
>>
>>
>> --
>> Travis
>> http://jeepadventures.dyndns.org/jeep.html
>> Happy trails!!!
>> :wq!
>
>Could be lean fuel mixture, late ignition timing, broken valve spring, or a
>cam lobe going bad. I'm sure there are others, but this is a start.
>
>Chris
>
Could any of those things you listed "come and go," though? If it was
lean, wouldn't it be lean all of the time? Late ignition
timing...hmm...maybe an intermittent vacuum leak causing the
distributor to not advance when it should? Hmm... Broken valve
spring? I can't see that causing this problem to show itself for 30
seconds and then let me drive it 1/2 hour without showing up again.
Cam lobe going bad? I also think that would be a more persistent
problem than what I'm seeing. I like the late ignition timing idea,
though. I'll have to poke around and look for a vacuum leak. Thanks!
--
Travis
http://jeepadventures.dyndns.org/jeep.html
Happy trails!!!
:wq!
12-01-2003, 05:03 PM
#17
Guest
Posts: n/a
Re: Speculation, please?
Travis, does your Jeep have a coil or the motorcraft ignition box? Possibly
something shorting one of the connections. Had a Karmann Ghia that did the
exact same thing.
Wade
"travis" <travist34removethis@hotmail.com> wrote in message
news:q93nsv825rnnovesaer5sbb14oj2jg7kjk@4ax.com...
> On Mon, 01 Dec 2003 13:37:55 -0500, travis
> <travist34removethis@hotmail.com> shared the following:
>
> >On Mon, 1 Dec 2003 12:54:45 -0500, "Joe" <me@privacy.net
> >(jo_ratner@yahoo.com)> shared the following:
> >
> >>Does it sound like a backfire?
> >
> >A little bit... Just got home and looked and don't see any burn marks
> >on the air cleaner.
>
> Oh, and it did it again on the way home. It seems like it does it
> soon after getting on the highway like it's not quite up to good
> operating temperature yet. By the time I've run at 60+ mph for a
> couple of minutes the problem seems to go away. Also I noticed I
> could feel a very slight "pulse" on my right foot that was on the gas
> pedal each time the bang noise occurred, but could not feel that same
> pulse on my left foot... which makes me think the carb is somehow
> involved here, like it's backfiring through it maybe. Still not sure
> at all.
>
> >
> >>
> >>"travis" <travist34removethis@hotmail.com> wrote in message
> >>news:f5vmsvstc3ggcrdu8od070q4ehsnk91bbg@4ax.com. ..
> >>> I'm worried about my CJ5. Yesterday while driving home from the
> >>> trails I got out on the highway and got up to about 75 mph in a hurry
> >>> to merge, then slowed down to about 65. Maybe 30 seconds later
> >>> several LOUD bangs/knocks (about 10-15 maybe) came from what sounded
> >>> like under the hood. With each bang there was a dramatic power drop
> >>> for a fraction of a second. This happened really quickly like within
> >>> 25-30 seconds or so. I let off on the gas and it seemed to help a
> >>> little bit. Each time I'd ease back on the gas the bangs would
> >>> return. I slowed down to about 50 mph and the banging sound went
> >>> away. I slowly sped back up to about 60 mph and made it the rest of
> >>> the way home without incident. I noticed when this all was happening
> >>> that my oil pressure stayed steady and my water temp was also steady.
> >>> Then... when I was driving to work this morning I heard 3-4 loud
> >>> bangs within less than 10 seconds while driving at about 65 mph on the
> >>> highway. I felt the same power drop and again noticed oil pressure
> >>> and temp remained unchanged. The problem "went away" again. I'm
> >>> thinking maybe it's backfiring through the carb (I'll check for burn
> >>> marks around the air cleaner later today) or maybe...just maybe...I
> >>> seem to recall a similar feel/sound from about 12-13 years ago when an
> >>> old Pontiac I had did something like this... turned out it had a
> >>> couple of lifters that were about to give up the ghost, or pretty much
> >>> had given up the ghost by the time I opened up the motor and replaced
> >>> them. Can y'all speculate on best-case/worst-case scenarios? Sorry I
> >>> can't give a better description of the sound. Ideas of stuff for me
> >>> to look at? Thank you in advance for input.
> >>>
> >>>
> >>> --
> >>> Travis
> >>> http://jeepadventures.dyndns.org/jeep.html
> >>> Happy trails!!!
> >>> :wq!
> >>
>
>
> --
> Travis
> http://jeepadventures.dyndns.org/jeep.html
> Happy trails!!!
> :wq!
something shorting one of the connections. Had a Karmann Ghia that did the
exact same thing.
Wade
"travis" <travist34removethis@hotmail.com> wrote in message
news:q93nsv825rnnovesaer5sbb14oj2jg7kjk@4ax.com...
> On Mon, 01 Dec 2003 13:37:55 -0500, travis
> <travist34removethis@hotmail.com> shared the following:
>
> >On Mon, 1 Dec 2003 12:54:45 -0500, "Joe" <me@privacy.net
> >(jo_ratner@yahoo.com)> shared the following:
> >
> >>Does it sound like a backfire?
> >
> >A little bit... Just got home and looked and don't see any burn marks
> >on the air cleaner.
>
> Oh, and it did it again on the way home. It seems like it does it
> soon after getting on the highway like it's not quite up to good
> operating temperature yet. By the time I've run at 60+ mph for a
> couple of minutes the problem seems to go away. Also I noticed I
> could feel a very slight "pulse" on my right foot that was on the gas
> pedal each time the bang noise occurred, but could not feel that same
> pulse on my left foot... which makes me think the carb is somehow
> involved here, like it's backfiring through it maybe. Still not sure
> at all.
>
> >
> >>
> >>"travis" <travist34removethis@hotmail.com> wrote in message
> >>news:f5vmsvstc3ggcrdu8od070q4ehsnk91bbg@4ax.com. ..
> >>> I'm worried about my CJ5. Yesterday while driving home from the
> >>> trails I got out on the highway and got up to about 75 mph in a hurry
> >>> to merge, then slowed down to about 65. Maybe 30 seconds later
> >>> several LOUD bangs/knocks (about 10-15 maybe) came from what sounded
> >>> like under the hood. With each bang there was a dramatic power drop
> >>> for a fraction of a second. This happened really quickly like within
> >>> 25-30 seconds or so. I let off on the gas and it seemed to help a
> >>> little bit. Each time I'd ease back on the gas the bangs would
> >>> return. I slowed down to about 50 mph and the banging sound went
> >>> away. I slowly sped back up to about 60 mph and made it the rest of
> >>> the way home without incident. I noticed when this all was happening
> >>> that my oil pressure stayed steady and my water temp was also steady.
> >>> Then... when I was driving to work this morning I heard 3-4 loud
> >>> bangs within less than 10 seconds while driving at about 65 mph on the
> >>> highway. I felt the same power drop and again noticed oil pressure
> >>> and temp remained unchanged. The problem "went away" again. I'm
> >>> thinking maybe it's backfiring through the carb (I'll check for burn
> >>> marks around the air cleaner later today) or maybe...just maybe...I
> >>> seem to recall a similar feel/sound from about 12-13 years ago when an
> >>> old Pontiac I had did something like this... turned out it had a
> >>> couple of lifters that were about to give up the ghost, or pretty much
> >>> had given up the ghost by the time I opened up the motor and replaced
> >>> them. Can y'all speculate on best-case/worst-case scenarios? Sorry I
> >>> can't give a better description of the sound. Ideas of stuff for me
> >>> to look at? Thank you in advance for input.
> >>>
> >>>
> >>> --
> >>> Travis
> >>> http://jeepadventures.dyndns.org/jeep.html
> >>> Happy trails!!!
> >>> :wq!
> >>
>
>
> --
> Travis
> http://jeepadventures.dyndns.org/jeep.html
> Happy trails!!!
> :wq!
12-01-2003, 05:03 PM
#18
Guest
Posts: n/a
Re: Speculation, please?
Travis, does your Jeep have a coil or the motorcraft ignition box? Possibly
something shorting one of the connections. Had a Karmann Ghia that did the
exact same thing.
Wade
"travis" <travist34removethis@hotmail.com> wrote in message
news:q93nsv825rnnovesaer5sbb14oj2jg7kjk@4ax.com...
> On Mon, 01 Dec 2003 13:37:55 -0500, travis
> <travist34removethis@hotmail.com> shared the following:
>
> >On Mon, 1 Dec 2003 12:54:45 -0500, "Joe" <me@privacy.net
> >(jo_ratner@yahoo.com)> shared the following:
> >
> >>Does it sound like a backfire?
> >
> >A little bit... Just got home and looked and don't see any burn marks
> >on the air cleaner.
>
> Oh, and it did it again on the way home. It seems like it does it
> soon after getting on the highway like it's not quite up to good
> operating temperature yet. By the time I've run at 60+ mph for a
> couple of minutes the problem seems to go away. Also I noticed I
> could feel a very slight "pulse" on my right foot that was on the gas
> pedal each time the bang noise occurred, but could not feel that same
> pulse on my left foot... which makes me think the carb is somehow
> involved here, like it's backfiring through it maybe. Still not sure
> at all.
>
> >
> >>
> >>"travis" <travist34removethis@hotmail.com> wrote in message
> >>news:f5vmsvstc3ggcrdu8od070q4ehsnk91bbg@4ax.com. ..
> >>> I'm worried about my CJ5. Yesterday while driving home from the
> >>> trails I got out on the highway and got up to about 75 mph in a hurry
> >>> to merge, then slowed down to about 65. Maybe 30 seconds later
> >>> several LOUD bangs/knocks (about 10-15 maybe) came from what sounded
> >>> like under the hood. With each bang there was a dramatic power drop
> >>> for a fraction of a second. This happened really quickly like within
> >>> 25-30 seconds or so. I let off on the gas and it seemed to help a
> >>> little bit. Each time I'd ease back on the gas the bangs would
> >>> return. I slowed down to about 50 mph and the banging sound went
> >>> away. I slowly sped back up to about 60 mph and made it the rest of
> >>> the way home without incident. I noticed when this all was happening
> >>> that my oil pressure stayed steady and my water temp was also steady.
> >>> Then... when I was driving to work this morning I heard 3-4 loud
> >>> bangs within less than 10 seconds while driving at about 65 mph on the
> >>> highway. I felt the same power drop and again noticed oil pressure
> >>> and temp remained unchanged. The problem "went away" again. I'm
> >>> thinking maybe it's backfiring through the carb (I'll check for burn
> >>> marks around the air cleaner later today) or maybe...just maybe...I
> >>> seem to recall a similar feel/sound from about 12-13 years ago when an
> >>> old Pontiac I had did something like this... turned out it had a
> >>> couple of lifters that were about to give up the ghost, or pretty much
> >>> had given up the ghost by the time I opened up the motor and replaced
> >>> them. Can y'all speculate on best-case/worst-case scenarios? Sorry I
> >>> can't give a better description of the sound. Ideas of stuff for me
> >>> to look at? Thank you in advance for input.
> >>>
> >>>
> >>> --
> >>> Travis
> >>> http://jeepadventures.dyndns.org/jeep.html
> >>> Happy trails!!!
> >>> :wq!
> >>
>
>
> --
> Travis
> http://jeepadventures.dyndns.org/jeep.html
> Happy trails!!!
> :wq!
something shorting one of the connections. Had a Karmann Ghia that did the
exact same thing.
Wade
"travis" <travist34removethis@hotmail.com> wrote in message
news:q93nsv825rnnovesaer5sbb14oj2jg7kjk@4ax.com...
> On Mon, 01 Dec 2003 13:37:55 -0500, travis
> <travist34removethis@hotmail.com> shared the following:
>
> >On Mon, 1 Dec 2003 12:54:45 -0500, "Joe" <me@privacy.net
> >(jo_ratner@yahoo.com)> shared the following:
> >
> >>Does it sound like a backfire?
> >
> >A little bit... Just got home and looked and don't see any burn marks
> >on the air cleaner.
>
> Oh, and it did it again on the way home. It seems like it does it
> soon after getting on the highway like it's not quite up to good
> operating temperature yet. By the time I've run at 60+ mph for a
> couple of minutes the problem seems to go away. Also I noticed I
> could feel a very slight "pulse" on my right foot that was on the gas
> pedal each time the bang noise occurred, but could not feel that same
> pulse on my left foot... which makes me think the carb is somehow
> involved here, like it's backfiring through it maybe. Still not sure
> at all.
>
> >
> >>
> >>"travis" <travist34removethis@hotmail.com> wrote in message
> >>news:f5vmsvstc3ggcrdu8od070q4ehsnk91bbg@4ax.com. ..
> >>> I'm worried about my CJ5. Yesterday while driving home from the
> >>> trails I got out on the highway and got up to about 75 mph in a hurry
> >>> to merge, then slowed down to about 65. Maybe 30 seconds later
> >>> several LOUD bangs/knocks (about 10-15 maybe) came from what sounded
> >>> like under the hood. With each bang there was a dramatic power drop
> >>> for a fraction of a second. This happened really quickly like within
> >>> 25-30 seconds or so. I let off on the gas and it seemed to help a
> >>> little bit. Each time I'd ease back on the gas the bangs would
> >>> return. I slowed down to about 50 mph and the banging sound went
> >>> away. I slowly sped back up to about 60 mph and made it the rest of
> >>> the way home without incident. I noticed when this all was happening
> >>> that my oil pressure stayed steady and my water temp was also steady.
> >>> Then... when I was driving to work this morning I heard 3-4 loud
> >>> bangs within less than 10 seconds while driving at about 65 mph on the
> >>> highway. I felt the same power drop and again noticed oil pressure
> >>> and temp remained unchanged. The problem "went away" again. I'm
> >>> thinking maybe it's backfiring through the carb (I'll check for burn
> >>> marks around the air cleaner later today) or maybe...just maybe...I
> >>> seem to recall a similar feel/sound from about 12-13 years ago when an
> >>> old Pontiac I had did something like this... turned out it had a
> >>> couple of lifters that were about to give up the ghost, or pretty much
> >>> had given up the ghost by the time I opened up the motor and replaced
> >>> them. Can y'all speculate on best-case/worst-case scenarios? Sorry I
> >>> can't give a better description of the sound. Ideas of stuff for me
> >>> to look at? Thank you in advance for input.
> >>>
> >>>
> >>> --
> >>> Travis
> >>> http://jeepadventures.dyndns.org/jeep.html
> >>> Happy trails!!!
> >>> :wq!
> >>
>
>
> --
> Travis
> http://jeepadventures.dyndns.org/jeep.html
> Happy trails!!!
> :wq!
12-01-2003, 05:03 PM
#19
Guest
Posts: n/a
Re: Speculation, please?
Travis, does your Jeep have a coil or the motorcraft ignition box? Possibly
something shorting one of the connections. Had a Karmann Ghia that did the
exact same thing.
Wade
"travis" <travist34removethis@hotmail.com> wrote in message
news:q93nsv825rnnovesaer5sbb14oj2jg7kjk@4ax.com...
> On Mon, 01 Dec 2003 13:37:55 -0500, travis
> <travist34removethis@hotmail.com> shared the following:
>
> >On Mon, 1 Dec 2003 12:54:45 -0500, "Joe" <me@privacy.net
> >(jo_ratner@yahoo.com)> shared the following:
> >
> >>Does it sound like a backfire?
> >
> >A little bit... Just got home and looked and don't see any burn marks
> >on the air cleaner.
>
> Oh, and it did it again on the way home. It seems like it does it
> soon after getting on the highway like it's not quite up to good
> operating temperature yet. By the time I've run at 60+ mph for a
> couple of minutes the problem seems to go away. Also I noticed I
> could feel a very slight "pulse" on my right foot that was on the gas
> pedal each time the bang noise occurred, but could not feel that same
> pulse on my left foot... which makes me think the carb is somehow
> involved here, like it's backfiring through it maybe. Still not sure
> at all.
>
> >
> >>
> >>"travis" <travist34removethis@hotmail.com> wrote in message
> >>news:f5vmsvstc3ggcrdu8od070q4ehsnk91bbg@4ax.com. ..
> >>> I'm worried about my CJ5. Yesterday while driving home from the
> >>> trails I got out on the highway and got up to about 75 mph in a hurry
> >>> to merge, then slowed down to about 65. Maybe 30 seconds later
> >>> several LOUD bangs/knocks (about 10-15 maybe) came from what sounded
> >>> like under the hood. With each bang there was a dramatic power drop
> >>> for a fraction of a second. This happened really quickly like within
> >>> 25-30 seconds or so. I let off on the gas and it seemed to help a
> >>> little bit. Each time I'd ease back on the gas the bangs would
> >>> return. I slowed down to about 50 mph and the banging sound went
> >>> away. I slowly sped back up to about 60 mph and made it the rest of
> >>> the way home without incident. I noticed when this all was happening
> >>> that my oil pressure stayed steady and my water temp was also steady.
> >>> Then... when I was driving to work this morning I heard 3-4 loud
> >>> bangs within less than 10 seconds while driving at about 65 mph on the
> >>> highway. I felt the same power drop and again noticed oil pressure
> >>> and temp remained unchanged. The problem "went away" again. I'm
> >>> thinking maybe it's backfiring through the carb (I'll check for burn
> >>> marks around the air cleaner later today) or maybe...just maybe...I
> >>> seem to recall a similar feel/sound from about 12-13 years ago when an
> >>> old Pontiac I had did something like this... turned out it had a
> >>> couple of lifters that were about to give up the ghost, or pretty much
> >>> had given up the ghost by the time I opened up the motor and replaced
> >>> them. Can y'all speculate on best-case/worst-case scenarios? Sorry I
> >>> can't give a better description of the sound. Ideas of stuff for me
> >>> to look at? Thank you in advance for input.
> >>>
> >>>
> >>> --
> >>> Travis
> >>> http://jeepadventures.dyndns.org/jeep.html
> >>> Happy trails!!!
> >>> :wq!
> >>
>
>
> --
> Travis
> http://jeepadventures.dyndns.org/jeep.html
> Happy trails!!!
> :wq!
something shorting one of the connections. Had a Karmann Ghia that did the
exact same thing.
Wade
"travis" <travist34removethis@hotmail.com> wrote in message
news:q93nsv825rnnovesaer5sbb14oj2jg7kjk@4ax.com...
> On Mon, 01 Dec 2003 13:37:55 -0500, travis
> <travist34removethis@hotmail.com> shared the following:
>
> >On Mon, 1 Dec 2003 12:54:45 -0500, "Joe" <me@privacy.net
> >(jo_ratner@yahoo.com)> shared the following:
> >
> >>Does it sound like a backfire?
> >
> >A little bit... Just got home and looked and don't see any burn marks
> >on the air cleaner.
>
> Oh, and it did it again on the way home. It seems like it does it
> soon after getting on the highway like it's not quite up to good
> operating temperature yet. By the time I've run at 60+ mph for a
> couple of minutes the problem seems to go away. Also I noticed I
> could feel a very slight "pulse" on my right foot that was on the gas
> pedal each time the bang noise occurred, but could not feel that same
> pulse on my left foot... which makes me think the carb is somehow
> involved here, like it's backfiring through it maybe. Still not sure
> at all.
>
> >
> >>
> >>"travis" <travist34removethis@hotmail.com> wrote in message
> >>news:f5vmsvstc3ggcrdu8od070q4ehsnk91bbg@4ax.com. ..
> >>> I'm worried about my CJ5. Yesterday while driving home from the
> >>> trails I got out on the highway and got up to about 75 mph in a hurry
> >>> to merge, then slowed down to about 65. Maybe 30 seconds later
> >>> several LOUD bangs/knocks (about 10-15 maybe) came from what sounded
> >>> like under the hood. With each bang there was a dramatic power drop
> >>> for a fraction of a second. This happened really quickly like within
> >>> 25-30 seconds or so. I let off on the gas and it seemed to help a
> >>> little bit. Each time I'd ease back on the gas the bangs would
> >>> return. I slowed down to about 50 mph and the banging sound went
> >>> away. I slowly sped back up to about 60 mph and made it the rest of
> >>> the way home without incident. I noticed when this all was happening
> >>> that my oil pressure stayed steady and my water temp was also steady.
> >>> Then... when I was driving to work this morning I heard 3-4 loud
> >>> bangs within less than 10 seconds while driving at about 65 mph on the
> >>> highway. I felt the same power drop and again noticed oil pressure
> >>> and temp remained unchanged. The problem "went away" again. I'm
> >>> thinking maybe it's backfiring through the carb (I'll check for burn
> >>> marks around the air cleaner later today) or maybe...just maybe...I
> >>> seem to recall a similar feel/sound from about 12-13 years ago when an
> >>> old Pontiac I had did something like this... turned out it had a
> >>> couple of lifters that were about to give up the ghost, or pretty much
> >>> had given up the ghost by the time I opened up the motor and replaced
> >>> them. Can y'all speculate on best-case/worst-case scenarios? Sorry I
> >>> can't give a better description of the sound. Ideas of stuff for me
> >>> to look at? Thank you in advance for input.
> >>>
> >>>
> >>> --
> >>> Travis
> >>> http://jeepadventures.dyndns.org/jeep.html
> >>> Happy trails!!!
> >>> :wq!
> >>
>
>
> --
> Travis
> http://jeepadventures.dyndns.org/jeep.html
> Happy trails!!!
> :wq!
12-01-2003, 05:15 PM
#20
Guest
Posts: n/a
Re: Speculation, please?
travis <travist34removethis@hotmail.com> writes:
> I'm worried about my CJ5. Yesterday while driving home from the
> trails I got out on the highway and got up to about 75 mph in a hurry
> to merge, then slowed down to about 65. Maybe 30 seconds later
> several LOUD bangs/knocks (about 10-15 maybe) came from what sounded
> like under the hood. With each bang there was a dramatic power drop
> for a fraction of a second. This happened really quickly like within
> 25-30 seconds or so. I let off on the gas and it seemed to help a
> little bit. Each time I'd ease back on the gas the bangs would
> return. I slowed down to about 50 mph and the banging sound went
> away. I slowly sped back up to about 60 mph and made it the rest of
> the way home without incident. I noticed when this all was happening
> that my oil pressure stayed steady and my water temp was also steady.
> Then... when I was driving to work this morning I heard 3-4 loud
> bangs within less than 10 seconds while driving at about 65 mph on the
> highway. I felt the same power drop and again noticed oil pressure
> and temp remained unchanged. The problem "went away" again. I'm
> thinking maybe it's backfiring through the carb (I'll check for burn
> marks around the air cleaner later today) or maybe...just maybe...I
> seem to recall a similar feel/sound from about 12-13 years ago when an
> old Pontiac I had did something like this... turned out it had a
> couple of lifters that were about to give up the ghost, or pretty much
> had given up the ghost by the time I opened up the motor and replaced
> them. Can y'all speculate on best-case/worst-case scenarios? Sorry I
> can't give a better description of the sound. Ideas of stuff for me
> to look at? Thank you in advance for input.
>
>
> --
> Travis
> http://jeepadventures.dyndns.org/jeep.html
> Happy trails!!!
> :wq!
I had something similar, fast banging with a momentary loss of power after
each bang. It turned out I hadn't changed my wires in a while. I put a new
set in, and the problem went away.
Will
> I'm worried about my CJ5. Yesterday while driving home from the
> trails I got out on the highway and got up to about 75 mph in a hurry
> to merge, then slowed down to about 65. Maybe 30 seconds later
> several LOUD bangs/knocks (about 10-15 maybe) came from what sounded
> like under the hood. With each bang there was a dramatic power drop
> for a fraction of a second. This happened really quickly like within
> 25-30 seconds or so. I let off on the gas and it seemed to help a
> little bit. Each time I'd ease back on the gas the bangs would
> return. I slowed down to about 50 mph and the banging sound went
> away. I slowly sped back up to about 60 mph and made it the rest of
> the way home without incident. I noticed when this all was happening
> that my oil pressure stayed steady and my water temp was also steady.
> Then... when I was driving to work this morning I heard 3-4 loud
> bangs within less than 10 seconds while driving at about 65 mph on the
> highway. I felt the same power drop and again noticed oil pressure
> and temp remained unchanged. The problem "went away" again. I'm
> thinking maybe it's backfiring through the carb (I'll check for burn
> marks around the air cleaner later today) or maybe...just maybe...I
> seem to recall a similar feel/sound from about 12-13 years ago when an
> old Pontiac I had did something like this... turned out it had a
> couple of lifters that were about to give up the ghost, or pretty much
> had given up the ghost by the time I opened up the motor and replaced
> them. Can y'all speculate on best-case/worst-case scenarios? Sorry I
> can't give a better description of the sound. Ideas of stuff for me
> to look at? Thank you in advance for input.
>
>
> --
> Travis
> http://jeepadventures.dyndns.org/jeep.html
> Happy trails!!!
> :wq!
I had something similar, fast banging with a momentary loss of power after
each bang. It turned out I hadn't changed my wires in a while. I put a new
set in, and the problem went away.
Will