Re: 97 TJ 4cyl - ticking/tapping noise after replacement of pluggedcat
I had a free warranty cat replacement where the new cat had a notch at
the end of the pipe that lined up perfectly with a similar one at the back end of the exhisting pipe from the manifold. Made a very similar sound until fixed. Will Honea proclaimed: > That does sound like mine when the CPS was shorting against the > manifold. As for the noise, since they worked on the exhaust I would > first check for either a loose downpipe or a cracked ehaust manifold. > Thye may have played Tarzan on the pipes while fitting the new cat - > of just not gotten it seated right. > > On Mon, 16 Jan 2006 00:33:28 UTC L.W.(ßill) ------ III > <----------@cox.net> wrote: > > >> The limp mode should default to the initial timing so it would be >>impossible to spark knock. >> God Bless America, Bill O|||||||O >>mailto:-------------------- http://www.----------.com/ >> >>DougW wrote: >> >>>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. > > > |
Re: 97 TJ 4cyl - ticking/tapping noise after replacement of plugged cat
My 2.5L TJ sounds exactly like the .mp3s.
Exhaust leak - no doubt about it. bllsht wrote: > It's an exhaust leak. |
Re: 97 TJ 4cyl - ticking/tapping noise after replacement of plugged cat
My 2.5L TJ sounds exactly like the .mp3s.
Exhaust leak - no doubt about it. bllsht wrote: > It's an exhaust leak. |
Re: 97 TJ 4cyl - ticking/tapping noise after replacement of plugged cat
My 2.5L TJ sounds exactly like the .mp3s.
Exhaust leak - no doubt about it. bllsht wrote: > It's an exhaust leak. |
Re: 97 TJ 4cyl - ticking/tapping noise after replacement of plugged cat
those 2.5's are well known for the rear exhaust manifold bolts breaking off flush
in the head i can even begin to count how many i have done Mike Romain wrote: > Well, if they are anything like the incompetent butchers that changed > our Cherokee's exhaust, you sure could now have a cracked manifold. > > Mike > 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00 > 88 Cherokee 235 BFG AT's > Canadian Off Road Trips Photos: Non members can still view! > Jan/06 http://www.imagestation.com/album/pi...?id=2115147590 > (More Off Road album links at bottom of the view page) > > 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
those 2.5's are well known for the rear exhaust manifold bolts breaking off flush
in the head i can even begin to count how many i have done Mike Romain wrote: > Well, if they are anything like the incompetent butchers that changed > our Cherokee's exhaust, you sure could now have a cracked manifold. > > Mike > 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00 > 88 Cherokee 235 BFG AT's > Canadian Off Road Trips Photos: Non members can still view! > Jan/06 http://www.imagestation.com/album/pi...?id=2115147590 > (More Off Road album links at bottom of the view page) > > 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
those 2.5's are well known for the rear exhaust manifold bolts breaking off flush
in the head i can even begin to count how many i have done Mike Romain wrote: > Well, if they are anything like the incompetent butchers that changed > our Cherokee's exhaust, you sure could now have a cracked manifold. > > Mike > 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00 > 88 Cherokee 235 BFG AT's > Canadian Off Road Trips Photos: Non members can still view! > Jan/06 http://www.imagestation.com/album/pi...?id=2115147590 > (More Off Road album links at bottom of the view page) > > 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
To follow up on this, I had it looked at in the week.
There were two problems - a bad manifold gasket and a cracked manifold. Thanks for all the replies and good suggestions. Keith "Lon" <lon.stowell@comcast.net> wrote in message news:FqCdndK6bbCGdFfenZ2dnUVZ_tKdnZ2d@comcast.com. .. > Was that there before the exhaust work? It sounds rather like a cracked > manifold or just a crappy install of the catalyst letting exhaust leak. |
Re: 97 TJ 4cyl - ticking/tapping noise after replacement of plugged cat
To follow up on this, I had it looked at in the week.
There were two problems - a bad manifold gasket and a cracked manifold. Thanks for all the replies and good suggestions. Keith "Lon" <lon.stowell@comcast.net> wrote in message news:FqCdndK6bbCGdFfenZ2dnUVZ_tKdnZ2d@comcast.com. .. > Was that there before the exhaust work? It sounds rather like a cracked > manifold or just a crappy install of the catalyst letting exhaust leak. |
Re: 97 TJ 4cyl - ticking/tapping noise after replacement of plugged cat
To follow up on this, I had it looked at in the week.
There were two problems - a bad manifold gasket and a cracked manifold. Thanks for all the replies and good suggestions. Keith "Lon" <lon.stowell@comcast.net> wrote in message news:FqCdndK6bbCGdFfenZ2dnUVZ_tKdnZ2d@comcast.com. .. > Was that there before the exhaust work? It sounds rather like a cracked > manifold or just a crappy install of the catalyst letting exhaust leak. |
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