Speculation, please?
 

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!

Re: Speculation, please?
 

"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

Re: Speculation, please?
 

"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

Re: Speculation, please?
 

"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

Re: Speculation, please?
 

Does it sound like a backfire?

"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!

Re: Speculation, please?
 

Does it sound like a backfire?

"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!

Re: Speculation, please?
 

Does it sound like a backfire?

"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!

Re: Speculation, please?
 

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.

>
>"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!

Re: Speculation, please?
 

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.

>
>"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!

Re: Speculation, please?
 

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.

>
>"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!