97 TJ 4cyl - ticking/tapping noise after replacement of plugged cat
 

I posted a couple of weeks ago concerning a problem with my 97 TJ (4cyl,
auto, 130K) and a lack of power at freeway speeds. I got some good
suggestions on here, the general consensus being that it could be a plugged
catalytic converter.

After that post, the problem apparently went away - until this past Friday
when the car lost almost all power, but I was able to limp it home using
very light throttle openings to (eventually) reach about 25/30 mph.

Yesterday, I got it to the shop to have a new cat fitted. This has restored
the power but now another (somewhat more serious sounding) problem is
evident:

I now have a ticking or tapping sound which gets faster with increased
engine speed and louder under wider throttle openings. At idle or when
cruising or when revving the engine gently at a standstill, you can't hear
the noise. But when any load is applied to the engine, the noise is
apparent.

I made a couple of mp3s to document the sound. The first is the vehicle
standing - you can hear the noise when I applied rapid throttle (0:01, 0:13,
0:19), but not when applying gentle throttle (0:03, 0:22) to reach the same
engine speeds:

http://www.aooa27.dsl.pipex.com/jeep0.mp3

The second is a short cruise around the block. You can pretty much hear it
at any time I accelerated:

http://www.aooa27.dsl.pipex.com/jeep1.mp3

I presume that in limping the vehicle home and to the shop, I broke
something. Under the hood, it sounds like it's coming from the top end of
the engine - but I don't have a stethoscope or anything to be able to say
for sure.

Any ideas here on what this could be ?

Thanks in advance for any help
Keith

Re: 97 TJ 4cyl - ticking/tapping noise after replacement of plugged cat
 

I just hear pinging, like with a really low octane gasoline. The
noise May be exaggerated via a new crack in one of the headers.
God Bless America, Bill O|||||||O
mailto:-------------------- http://www.----------.com/

Keith Orbell wrote:
>
> I posted a couple of weeks ago concerning a problem with my 97 TJ (4cyl,
> auto, 130K) and a lack of power at freeway speeds. I got some good
> suggestions on here, the general consensus being that it could be a plugged
> catalytic converter.
>
> After that post, the problem apparently went away - until this past Friday
> when the car lost almost all power, but I was able to limp it home using
> very light throttle openings to (eventually) reach about 25/30 mph.
>
> Yesterday, I got it to the shop to have a new cat fitted. This has restored
> the power but now another (somewhat more serious sounding) problem is
> evident:
>
> I now have a ticking or tapping sound which gets faster with increased
> engine speed and louder under wider throttle openings. At idle or when
> cruising or when revving the engine gently at a standstill, you can't hear
> the noise. But when any load is applied to the engine, the noise is
> apparent.
>
> I made a couple of mp3s to document the sound. The first is the vehicle
> standing - you can hear the noise when I applied rapid throttle (0:01, 0:13,
> 0:19), but not when applying gentle throttle (0:03, 0:22) to reach the same
> engine speeds:
>
> http://www.aooa27.dsl.pipex.com/jeep0.mp3
>
> The second is a short cruise around the block. You can pretty much hear it
> at any time I accelerated:
>
> http://www.aooa27.dsl.pipex.com/jeep1.mp3
>
> I presume that in limping the vehicle home and to the shop, I broke
> something. Under the hood, it sounds like it's coming from the top end of
> the engine - but I don't have a stethoscope or anything to be able to say
> for sure.
>
> Any ideas here on what this could be ?
>
> Thanks in advance for any help
> Keith

Re: 97 TJ 4cyl - ticking/tapping noise after replacement of plugged cat
 

I just hear pinging, like with a really low octane gasoline. The
noise May be exaggerated via a new crack in one of the headers.
God Bless America, Bill O|||||||O
mailto:-------------------- http://www.----------.com/

Keith Orbell wrote:
>
> I posted a couple of weeks ago concerning a problem with my 97 TJ (4cyl,
> auto, 130K) and a lack of power at freeway speeds. I got some good
> suggestions on here, the general consensus being that it could be a plugged
> catalytic converter.
>
> After that post, the problem apparently went away - until this past Friday
> when the car lost almost all power, but I was able to limp it home using
> very light throttle openings to (eventually) reach about 25/30 mph.
>
> Yesterday, I got it to the shop to have a new cat fitted. This has restored
> the power but now another (somewhat more serious sounding) problem is
> evident:
>
> I now have a ticking or tapping sound which gets faster with increased
> engine speed and louder under wider throttle openings. At idle or when
> cruising or when revving the engine gently at a standstill, you can't hear
> the noise. But when any load is applied to the engine, the noise is
> apparent.
>
> I made a couple of mp3s to document the sound. The first is the vehicle
> standing - you can hear the noise when I applied rapid throttle (0:01, 0:13,
> 0:19), but not when applying gentle throttle (0:03, 0:22) to reach the same
> engine speeds:
>
> http://www.aooa27.dsl.pipex.com/jeep0.mp3
>
> The second is a short cruise around the block. You can pretty much hear it
> at any time I accelerated:
>
> http://www.aooa27.dsl.pipex.com/jeep1.mp3
>
> I presume that in limping the vehicle home and to the shop, I broke
> something. Under the hood, it sounds like it's coming from the top end of
> the engine - but I don't have a stethoscope or anything to be able to say
> for sure.
>
> Any ideas here on what this could be ?
>
> Thanks in advance for any help
> Keith

Re: 97 TJ 4cyl - ticking/tapping noise after replacement of plugged cat
 

I just hear pinging, like with a really low octane gasoline. The
noise May be exaggerated via a new crack in one of the headers.
God Bless America, Bill O|||||||O
mailto:-------------------- http://www.----------.com/

Keith Orbell wrote:
>
> I posted a couple of weeks ago concerning a problem with my 97 TJ (4cyl,
> auto, 130K) and a lack of power at freeway speeds. I got some good
> suggestions on here, the general consensus being that it could be a plugged
> catalytic converter.
>
> After that post, the problem apparently went away - until this past Friday
> when the car lost almost all power, but I was able to limp it home using
> very light throttle openings to (eventually) reach about 25/30 mph.
>
> Yesterday, I got it to the shop to have a new cat fitted. This has restored
> the power but now another (somewhat more serious sounding) problem is
> evident:
>
> I now have a ticking or tapping sound which gets faster with increased
> engine speed and louder under wider throttle openings. At idle or when
> cruising or when revving the engine gently at a standstill, you can't hear
> the noise. But when any load is applied to the engine, the noise is
> apparent.
>
> I made a couple of mp3s to document the sound. The first is the vehicle
> standing - you can hear the noise when I applied rapid throttle (0:01, 0:13,
> 0:19), but not when applying gentle throttle (0:03, 0:22) to reach the same
> engine speeds:
>
> http://www.aooa27.dsl.pipex.com/jeep0.mp3
>
> The second is a short cruise around the block. You can pretty much hear it
> at any time I accelerated:
>
> http://www.aooa27.dsl.pipex.com/jeep1.mp3
>
> I presume that in limping the vehicle home and to the shop, I broke
> something. Under the hood, it sounds like it's coming from the top end of
> the engine - but I don't have a stethoscope or anything to be able to say
> for sure.
>
> Any ideas here on what this could be ?
>
> Thanks in advance for any help
> Keith

Re: 97 TJ 4cyl - ticking/tapping noise after replacement of plugged cat
 

L.W. ("ßill") ------ III did pass the time by typing:
> I just hear pinging, like with a really low octane gasoline. The
> noise May be exaggerated via a new crack in one of the headers.

That's what I'm thinking.

I'm also thinking the ECU hasn't adjusted back from where it was
and the OP should take the battery off for about half an hour and
then let it re-learn.


> Keith Orbell wrote:
>>
>> I posted a couple of weeks ago concerning a problem with my 97 TJ (4cyl,
>> auto, 130K) and a lack of power at freeway speeds. I got some good
>> suggestions on here, the general consensus being that it could be a plugged
>> catalytic converter.
>>
>> After that post, the problem apparently went away - until this past Friday
>> when the car lost almost all power, but I was able to limp it home using
>> very light throttle openings to (eventually) reach about 25/30 mph.
>>
>> Yesterday, I got it to the shop to have a new cat fitted. This has restored
>> the power but now another (somewhat more serious sounding) problem is
>> evident:
>>
>> I now have a ticking or tapping sound which gets faster with increased
>> engine speed and louder under wider throttle openings. At idle or when
>> cruising or when revving the engine gently at a standstill, you can't hear
>> the noise. But when any load is applied to the engine, the noise is
>> apparent.
>>
>> I made a couple of mp3s to document the sound. The first is the vehicle
>> standing - you can hear the noise when I applied rapid throttle (0:01, 0:13,
>> 0:19), but not when applying gentle throttle (0:03, 0:22) to reach the same
>> engine speeds:
>>
>> http://www.aooa27.dsl.pipex.com/jeep0.mp3
>>
>> The second is a short cruise around the block. You can pretty much hear it
>> at any time I accelerated:
>>
>> http://www.aooa27.dsl.pipex.com/jeep1.mp3
>>
>> I presume that in limping the vehicle home and to the shop, I broke
>> something. Under the hood, it sounds like it's coming from the top end of
>> the engine - but I don't have a stethoscope or anything to be able to say
>> for sure.
>>
>> Any ideas here on what this could be ?
>>
>> Thanks in advance for any help
>> Keith

Re: 97 TJ 4cyl - ticking/tapping noise after replacement of plugged cat
 

L.W. ("ßill") ------ III did pass the time by typing:
> I just hear pinging, like with a really low octane gasoline. The
> noise May be exaggerated via a new crack in one of the headers.

That's what I'm thinking.

I'm also thinking the ECU hasn't adjusted back from where it was
and the OP should take the battery off for about half an hour and
then let it re-learn.


> Keith Orbell wrote:
>>
>> I posted a couple of weeks ago concerning a problem with my 97 TJ (4cyl,
>> auto, 130K) and a lack of power at freeway speeds. I got some good
>> suggestions on here, the general consensus being that it could be a plugged
>> catalytic converter.
>>
>> After that post, the problem apparently went away - until this past Friday
>> when the car lost almost all power, but I was able to limp it home using
>> very light throttle openings to (eventually) reach about 25/30 mph.
>>
>> Yesterday, I got it to the shop to have a new cat fitted. This has restored
>> the power but now another (somewhat more serious sounding) problem is
>> evident:
>>
>> I now have a ticking or tapping sound which gets faster with increased
>> engine speed and louder under wider throttle openings. At idle or when
>> cruising or when revving the engine gently at a standstill, you can't hear
>> the noise. But when any load is applied to the engine, the noise is
>> apparent.
>>
>> I made a couple of mp3s to document the sound. The first is the vehicle
>> standing - you can hear the noise when I applied rapid throttle (0:01, 0:13,
>> 0:19), but not when applying gentle throttle (0:03, 0:22) to reach the same
>> engine speeds:
>>
>> http://www.aooa27.dsl.pipex.com/jeep0.mp3
>>
>> The second is a short cruise around the block. You can pretty much hear it
>> at any time I accelerated:
>>
>> http://www.aooa27.dsl.pipex.com/jeep1.mp3
>>
>> I presume that in limping the vehicle home and to the shop, I broke
>> something. Under the hood, it sounds like it's coming from the top end of
>> the engine - but I don't have a stethoscope or anything to be able to say
>> for sure.
>>
>> Any ideas here on what this could be ?
>>
>> Thanks in advance for any help
>> Keith

Re: 97 TJ 4cyl - ticking/tapping noise after replacement of plugged cat
 

L.W. ("ßill") ------ III did pass the time by typing:
> I just hear pinging, like with a really low octane gasoline. The
> noise May be exaggerated via a new crack in one of the headers.

That's what I'm thinking.

I'm also thinking the ECU hasn't adjusted back from where it was
and the OP should take the battery off for about half an hour and
then let it re-learn.


> Keith Orbell wrote:
>>
>> I posted a couple of weeks ago concerning a problem with my 97 TJ (4cyl,
>> auto, 130K) and a lack of power at freeway speeds. I got some good
>> suggestions on here, the general consensus being that it could be a plugged
>> catalytic converter.
>>
>> After that post, the problem apparently went away - until this past Friday
>> when the car lost almost all power, but I was able to limp it home using
>> very light throttle openings to (eventually) reach about 25/30 mph.
>>
>> Yesterday, I got it to the shop to have a new cat fitted. This has restored
>> the power but now another (somewhat more serious sounding) problem is
>> evident:
>>
>> I now have a ticking or tapping sound which gets faster with increased
>> engine speed and louder under wider throttle openings. At idle or when
>> cruising or when revving the engine gently at a standstill, you can't hear
>> the noise. But when any load is applied to the engine, the noise is
>> apparent.
>>
>> I made a couple of mp3s to document the sound. The first is the vehicle
>> standing - you can hear the noise when I applied rapid throttle (0:01, 0:13,
>> 0:19), but not when applying gentle throttle (0:03, 0:22) to reach the same
>> engine speeds:
>>
>> http://www.aooa27.dsl.pipex.com/jeep0.mp3
>>
>> The second is a short cruise around the block. You can pretty much hear it
>> at any time I accelerated:
>>
>> http://www.aooa27.dsl.pipex.com/jeep1.mp3
>>
>> I presume that in limping the vehicle home and to the shop, I broke
>> something. Under the hood, it sounds like it's coming from the top end of
>> the engine - but I don't have a stethoscope or anything to be able to say
>> for sure.
>>
>> Any ideas here on what this could be ?
>>
>> Thanks in advance for any help
>> Keith

Re: 97 TJ 4cyl - ticking/tapping noise after replacement of plugged cat
 

It's an exhaust leak.


In message <JIWdnc9cjLaMTlfenZ2dnUVZ_tmdnZ2d@wideopenwest.com >, "Keith Orbell"
wrote:

>I posted a couple of weeks ago concerning a problem with my 97 TJ (4cyl,
>auto, 130K) and a lack of power at freeway speeds. I got some good
>suggestions on here, the general consensus being that it could be a plugged
>catalytic converter.
>
>After that post, the problem apparently went away - until this past Friday
>when the car lost almost all power, but I was able to limp it home using
>very light throttle openings to (eventually) reach about 25/30 mph.
>
>Yesterday, I got it to the shop to have a new cat fitted. This has restored
>the power but now another (somewhat more serious sounding) problem is
>evident:
>
>I now have a ticking or tapping sound which gets faster with increased
>engine speed and louder under wider throttle openings. At idle or when
>cruising or when revving the engine gently at a standstill, you can't hear
>the noise. But when any load is applied to the engine, the noise is
>apparent.
>
>I made a couple of mp3s to document the sound. The first is the vehicle
>standing - you can hear the noise when I applied rapid throttle (0:01, 0:13,
>0:19), but not when applying gentle throttle (0:03, 0:22) to reach the same
>engine speeds:
>
>http://www.aooa27.dsl.pipex.com/jeep0.mp3
>
>The second is a short cruise around the block. You can pretty much hear it
>at any time I accelerated:
>
>http://www.aooa27.dsl.pipex.com/jeep1.mp3
>
>I presume that in limping the vehicle home and to the shop, I broke
>something. Under the hood, it sounds like it's coming from the top end of
>the engine - but I don't have a stethoscope or anything to be able to say
>for sure.
>
>Any ideas here on what this could be ?
>
>Thanks in advance for any help
>Keith
>

Re: 97 TJ 4cyl - ticking/tapping noise after replacement of plugged cat
 

It's an exhaust leak.


In message <JIWdnc9cjLaMTlfenZ2dnUVZ_tmdnZ2d@wideopenwest.com >, "Keith Orbell"
wrote:

>I posted a couple of weeks ago concerning a problem with my 97 TJ (4cyl,
>auto, 130K) and a lack of power at freeway speeds. I got some good
>suggestions on here, the general consensus being that it could be a plugged
>catalytic converter.
>
>After that post, the problem apparently went away - until this past Friday
>when the car lost almost all power, but I was able to limp it home using
>very light throttle openings to (eventually) reach about 25/30 mph.
>
>Yesterday, I got it to the shop to have a new cat fitted. This has restored
>the power but now another (somewhat more serious sounding) problem is
>evident:
>
>I now have a ticking or tapping sound which gets faster with increased
>engine speed and louder under wider throttle openings. At idle or when
>cruising or when revving the engine gently at a standstill, you can't hear
>the noise. But when any load is applied to the engine, the noise is
>apparent.
>
>I made a couple of mp3s to document the sound. The first is the vehicle
>standing - you can hear the noise when I applied rapid throttle (0:01, 0:13,
>0:19), but not when applying gentle throttle (0:03, 0:22) to reach the same
>engine speeds:
>
>http://www.aooa27.dsl.pipex.com/jeep0.mp3
>
>The second is a short cruise around the block. You can pretty much hear it
>at any time I accelerated:
>
>http://www.aooa27.dsl.pipex.com/jeep1.mp3
>
>I presume that in limping the vehicle home and to the shop, I broke
>something. Under the hood, it sounds like it's coming from the top end of
>the engine - but I don't have a stethoscope or anything to be able to say
>for sure.
>
>Any ideas here on what this could be ?
>
>Thanks in advance for any help
>Keith
>

Re: 97 TJ 4cyl - ticking/tapping noise after replacement of plugged cat
 

It's an exhaust leak.


In message <JIWdnc9cjLaMTlfenZ2dnUVZ_tmdnZ2d@wideopenwest.com >, "Keith Orbell"
wrote:

>I posted a couple of weeks ago concerning a problem with my 97 TJ (4cyl,
>auto, 130K) and a lack of power at freeway speeds. I got some good
>suggestions on here, the general consensus being that it could be a plugged
>catalytic converter.
>
>After that post, the problem apparently went away - until this past Friday
>when the car lost almost all power, but I was able to limp it home using
>very light throttle openings to (eventually) reach about 25/30 mph.
>
>Yesterday, I got it to the shop to have a new cat fitted. This has restored
>the power but now another (somewhat more serious sounding) problem is
>evident:
>
>I now have a ticking or tapping sound which gets faster with increased
>engine speed and louder under wider throttle openings. At idle or when
>cruising or when revving the engine gently at a standstill, you can't hear
>the noise. But when any load is applied to the engine, the noise is
>apparent.
>
>I made a couple of mp3s to document the sound. The first is the vehicle
>standing - you can hear the noise when I applied rapid throttle (0:01, 0:13,
>0:19), but not when applying gentle throttle (0:03, 0:22) to reach the same
>engine speeds:
>
>http://www.aooa27.dsl.pipex.com/jeep0.mp3
>
>The second is a short cruise around the block. You can pretty much hear it
>at any time I accelerated:
>
>http://www.aooa27.dsl.pipex.com/jeep1.mp3
>
>I presume that in limping the vehicle home and to the shop, I broke
>something. Under the hood, it sounds like it's coming from the top end of
>the engine - but I don't have a stethoscope or anything to be able to say
>for sure.
>
>Any ideas here on what this could be ?
>
>Thanks in advance for any help
>Keith
>