Everyone has already said the cat converter, but I figured I'd through
out a possible cracked exhaust manifold. Although it wouldn't make
sense to be hearing it from the passenger side. When mine started to
go, I'd hear it most when under load as you mentioned. Thought it was
engine ping at first. Just wanted to mention it as a possibility.

Dave
http://mysite.verizon.net/res0p2es/david/index.htm

On Thu, 20 May 2004 14:57:59 GMT, "Eric" <gymrat@baileyscorner.com>
wrote:

>I have developed a strange noise... almost a rattle.. from what I believe is
>the under/passenger side of my 99 TJ. It doesn't happen all the time, seems
>to happen mostly when it is warm and has been under a load (i.e. stop-n-go
>traffic, highway driving, etc) for a while. The rattle is the loudest when
>under load, i.e. when I take off from a stop sign or accelerate up a hill.
>It has gotten louder lately. One day it was so bad, the "rattle" (sounds
>like metal tapping metal, actually) was happening at idle. I got out, and
>since I was in uniform and couldn't crawl under it, I just stuck my foot on
>the tailpipe to see if that would stop it, and it seemed to.
>
>I'm finally home, but can't get it to duplicate at a time when I can put it
>up on stands and take a look at it. Every time I do, it won't duplicate. I
>DID find a lot of green/white powdery stuff caked on the pipe between the
>cat and the muffler. I've never seen that before. The pipe has a thick
>coating of this junk from end to end of the pipe connecting the cat to the
>muffler.
>
>Any thoughts on this? It isn't one of those "it's a Jeep, it makes noise,
>deal with it" situations. My wife thought the muffler was dragging
>yesterday it got so bad.
>
>By the way, I tapped, pulled, pushed, and prodded the exhaust from the
>downpipe back. Nothing loose that I could see.
>
>Eric
>99 TJ SE
>

 

David C. Moller did pass the time by typing:
> Everyone has already said the cat converter, but I figured I'd through
> out a possible cracked exhaust manifold. Although it wouldn't make
> sense to be hearing it from the passenger side. When mine started to
> go, I'd hear it most when under load as you mentioned. Thought it was
> engine ping at first. Just wanted to mention it as a possibility.

Not a bad thing to check. Turned out what I lived with for about
a year thinking it was lifter tick was actually a teeny exhaust
leak on #6 and the start of a cracked header.


--
DougW

 

David C. Moller did pass the time by typing:
> Everyone has already said the cat converter, but I figured I'd through
> out a possible cracked exhaust manifold. Although it wouldn't make
> sense to be hearing it from the passenger side. When mine started to
> go, I'd hear it most when under load as you mentioned. Thought it was
> engine ping at first. Just wanted to mention it as a possibility.

Not a bad thing to check. Turned out what I lived with for about
a year thinking it was lifter tick was actually a teeny exhaust
leak on #6 and the start of a cracked header.


--
DougW

 

David C. Moller did pass the time by typing:
> Everyone has already said the cat converter, but I figured I'd through
> out a possible cracked exhaust manifold. Although it wouldn't make
> sense to be hearing it from the passenger side. When mine started to
> go, I'd hear it most when under load as you mentioned. Thought it was
> engine ping at first. Just wanted to mention it as a possibility.

Not a bad thing to check. Turned out what I lived with for about
a year thinking it was lifter tick was actually a teeny exhaust
leak on #6 and the start of a cracked header.


--
DougW

 

David C. Moller did pass the time by typing:
> Everyone has already said the cat converter, but I figured I'd through
> out a possible cracked exhaust manifold. Although it wouldn't make
> sense to be hearing it from the passenger side. When mine started to
> go, I'd hear it most when under load as you mentioned. Thought it was
> engine ping at first. Just wanted to mention it as a possibility.

Not a bad thing to check. Turned out what I lived with for about
a year thinking it was lifter tick was actually a teeny exhaust
leak on #6 and the start of a cracked header.


--
DougW

 

I'm pretty sure it's the cat too. Called a Jeep dealer today and it should
still be under warranty. I have an appointment to get it replaced tomorrow.
Good thing too, I barely made it home today. NO POWER AT ALL. Not to
mention I've gotten 92 miles on this tank of gas and I'm approaching the red
line...

The power issue didn't start until yesterday/earlier today. Either that or
the power issue wasn't a noticeable issue until then. Should I have the
stealership check anything else out for damage?? I'm driving about 3 - 5
miles to the shop tomorrow, hoping that won't be a big deal...

Eric
99 TJ SE


"Jeepster" <yj_driver@NOSPAM___.com> wrote in message
news:o3fqa0pb74o8o2rngicsgkgd3g4tqa7718@4ax.com...
> On Thu, 20 May 2004 14:57:59 GMT, "Eric" <gymrat@baileyscorner.com>
> wrote:
>
> >I have developed a strange noise... almost a rattle.. from what I believe
is
> >the under/passenger side of my 99 TJ. It doesn't happen all the time,
seems
> >to happen mostly when it is warm and has been under a load (i.e.
stop-n-go
> >traffic, highway driving, etc) for a while. The rattle is the loudest
when
> >under load, i.e. when I take off from a stop sign or accelerate up a
hill.
> >It has gotten louder lately. One day it was so bad, the "rattle" (sounds
> >like metal tapping metal, actually) was happening at idle. I got out,
and
> >since I was in uniform and couldn't crawl under it, I just stuck my foot
on
> >the tailpipe to see if that would stop it, and it seemed to.
> >
> >I'm finally home, but can't get it to duplicate at a time when I can put
it
> >up on stands and take a look at it. Every time I do, it won't duplicate.
I
> >DID find a lot of green/white powdery stuff caked on the pipe between the
> >cat and the muffler. I've never seen that before. The pipe has a thick
> >coating of this junk from end to end of the pipe connecting the cat to
the
> >muffler.
> >
> >Any thoughts on this? It isn't one of those "it's a Jeep, it makes noise,
> >deal with it" situations. My wife thought the muffler was dragging
> >yesterday it got so bad.
> >
> >By the way, I tapped, pulled, pushed, and prodded the exhaust from the
> >downpipe back. Nothing loose that I could see.
> >
> >Eric
> >99 TJ SE
> >
> Ditto on the cat comments I have had a few go like that.... change it
> before it plugs right up or causes excessive back pressure on your
> engine. The first one that went on me rattled for a few months then it
> decided to break up and jam into the cat outlet nozzle and drop my
> forward momentum to a crawl, I actually went out and drilled a 5/8"
> hole in the front of the converter to allow me to drive to the muffler
> shop.

 

I'm pretty sure it's the cat too. Called a Jeep dealer today and it should
still be under warranty. I have an appointment to get it replaced tomorrow.
Good thing too, I barely made it home today. NO POWER AT ALL. Not to
mention I've gotten 92 miles on this tank of gas and I'm approaching the red
line...

The power issue didn't start until yesterday/earlier today. Either that or
the power issue wasn't a noticeable issue until then. Should I have the
stealership check anything else out for damage?? I'm driving about 3 - 5
miles to the shop tomorrow, hoping that won't be a big deal...

Eric
99 TJ SE


"Jeepster" <yj_driver@NOSPAM___.com> wrote in message
news:o3fqa0pb74o8o2rngicsgkgd3g4tqa7718@4ax.com...
> On Thu, 20 May 2004 14:57:59 GMT, "Eric" <gymrat@baileyscorner.com>
> wrote:
>
> >I have developed a strange noise... almost a rattle.. from what I believe
is
> >the under/passenger side of my 99 TJ. It doesn't happen all the time,
seems
> >to happen mostly when it is warm and has been under a load (i.e.
stop-n-go
> >traffic, highway driving, etc) for a while. The rattle is the loudest
when
> >under load, i.e. when I take off from a stop sign or accelerate up a
hill.
> >It has gotten louder lately. One day it was so bad, the "rattle" (sounds
> >like metal tapping metal, actually) was happening at idle. I got out,
and
> >since I was in uniform and couldn't crawl under it, I just stuck my foot
on
> >the tailpipe to see if that would stop it, and it seemed to.
> >
> >I'm finally home, but can't get it to duplicate at a time when I can put
it
> >up on stands and take a look at it. Every time I do, it won't duplicate.
I
> >DID find a lot of green/white powdery stuff caked on the pipe between the
> >cat and the muffler. I've never seen that before. The pipe has a thick
> >coating of this junk from end to end of the pipe connecting the cat to
the
> >muffler.
> >
> >Any thoughts on this? It isn't one of those "it's a Jeep, it makes noise,
> >deal with it" situations. My wife thought the muffler was dragging
> >yesterday it got so bad.
> >
> >By the way, I tapped, pulled, pushed, and prodded the exhaust from the
> >downpipe back. Nothing loose that I could see.
> >
> >Eric
> >99 TJ SE
> >
> Ditto on the cat comments I have had a few go like that.... change it
> before it plugs right up or causes excessive back pressure on your
> engine. The first one that went on me rattled for a few months then it
> decided to break up and jam into the cat outlet nozzle and drop my
> forward momentum to a crawl, I actually went out and drilled a 5/8"
> hole in the front of the converter to allow me to drive to the muffler
> shop.

 

I'm pretty sure it's the cat too. Called a Jeep dealer today and it should
still be under warranty. I have an appointment to get it replaced tomorrow.
Good thing too, I barely made it home today. NO POWER AT ALL. Not to
mention I've gotten 92 miles on this tank of gas and I'm approaching the red
line...

The power issue didn't start until yesterday/earlier today. Either that or
the power issue wasn't a noticeable issue until then. Should I have the
stealership check anything else out for damage?? I'm driving about 3 - 5
miles to the shop tomorrow, hoping that won't be a big deal...

Eric
99 TJ SE


"Jeepster" <yj_driver@NOSPAM___.com> wrote in message
news:o3fqa0pb74o8o2rngicsgkgd3g4tqa7718@4ax.com...
> On Thu, 20 May 2004 14:57:59 GMT, "Eric" <gymrat@baileyscorner.com>
> wrote:
>
> >I have developed a strange noise... almost a rattle.. from what I believe
is
> >the under/passenger side of my 99 TJ. It doesn't happen all the time,
seems
> >to happen mostly when it is warm and has been under a load (i.e.
stop-n-go
> >traffic, highway driving, etc) for a while. The rattle is the loudest
when
> >under load, i.e. when I take off from a stop sign or accelerate up a
hill.
> >It has gotten louder lately. One day it was so bad, the "rattle" (sounds
> >like metal tapping metal, actually) was happening at idle. I got out,
and
> >since I was in uniform and couldn't crawl under it, I just stuck my foot
on
> >the tailpipe to see if that would stop it, and it seemed to.
> >
> >I'm finally home, but can't get it to duplicate at a time when I can put
it
> >up on stands and take a look at it. Every time I do, it won't duplicate.
I
> >DID find a lot of green/white powdery stuff caked on the pipe between the
> >cat and the muffler. I've never seen that before. The pipe has a thick
> >coating of this junk from end to end of the pipe connecting the cat to
the
> >muffler.
> >
> >Any thoughts on this? It isn't one of those "it's a Jeep, it makes noise,
> >deal with it" situations. My wife thought the muffler was dragging
> >yesterday it got so bad.
> >
> >By the way, I tapped, pulled, pushed, and prodded the exhaust from the
> >downpipe back. Nothing loose that I could see.
> >
> >Eric
> >99 TJ SE
> >
> Ditto on the cat comments I have had a few go like that.... change it
> before it plugs right up or causes excessive back pressure on your
> engine. The first one that went on me rattled for a few months then it
> decided to break up and jam into the cat outlet nozzle and drop my
> forward momentum to a crawl, I actually went out and drilled a 5/8"
> hole in the front of the converter to allow me to drive to the muffler
> shop.

 

I'm pretty sure it's the cat too. Called a Jeep dealer today and it should
still be under warranty. I have an appointment to get it replaced tomorrow.
Good thing too, I barely made it home today. NO POWER AT ALL. Not to
mention I've gotten 92 miles on this tank of gas and I'm approaching the red
line...

The power issue didn't start until yesterday/earlier today. Either that or
the power issue wasn't a noticeable issue until then. Should I have the
stealership check anything else out for damage?? I'm driving about 3 - 5
miles to the shop tomorrow, hoping that won't be a big deal...

Eric
99 TJ SE


"Jeepster" <yj_driver@NOSPAM___.com> wrote in message
news:o3fqa0pb74o8o2rngicsgkgd3g4tqa7718@4ax.com...
> On Thu, 20 May 2004 14:57:59 GMT, "Eric" <gymrat@baileyscorner.com>
> wrote:
>
> >I have developed a strange noise... almost a rattle.. from what I believe
is
> >the under/passenger side of my 99 TJ. It doesn't happen all the time,
seems
> >to happen mostly when it is warm and has been under a load (i.e.
stop-n-go
> >traffic, highway driving, etc) for a while. The rattle is the loudest
when
> >under load, i.e. when I take off from a stop sign or accelerate up a
hill.
> >It has gotten louder lately. One day it was so bad, the "rattle" (sounds
> >like metal tapping metal, actually) was happening at idle. I got out,
and
> >since I was in uniform and couldn't crawl under it, I just stuck my foot
on
> >the tailpipe to see if that would stop it, and it seemed to.
> >
> >I'm finally home, but can't get it to duplicate at a time when I can put
it
> >up on stands and take a look at it. Every time I do, it won't duplicate.
I
> >DID find a lot of green/white powdery stuff caked on the pipe between the
> >cat and the muffler. I've never seen that before. The pipe has a thick
> >coating of this junk from end to end of the pipe connecting the cat to
the
> >muffler.
> >
> >Any thoughts on this? It isn't one of those "it's a Jeep, it makes noise,
> >deal with it" situations. My wife thought the muffler was dragging
> >yesterday it got so bad.
> >
> >By the way, I tapped, pulled, pushed, and prodded the exhaust from the
> >downpipe back. Nothing loose that I could see.
> >
> >Eric
> >99 TJ SE
> >
> Ditto on the cat comments I have had a few go like that.... change it
> before it plugs right up or causes excessive back pressure on your
> engine. The first one that went on me rattled for a few months then it
> decided to break up and jam into the cat outlet nozzle and drop my
> forward momentum to a crawl, I actually went out and drilled a 5/8"
> hole in the front of the converter to allow me to drive to the muffler
> shop.