post #1 of Old 02-13-2002, 11:14 AM Thread Starter
92jeeper
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Join Date: Feb 2002
Location: New Orleans, La
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Poor performance and exhaust smell

My 92 2.5 fuel injected jeep sometimes does not want to go above 60mph no matter how much I press the gas. Also, there is always an exhaust smell. I have recently changed the Cat. converter, muffler, fuel pump and filter, Transmission and clutch. This problem has remained constant thoughout all these changes. Any suggestions???

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post #2 of Old 02-13-2002, 01:24 PM
Islander89
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Location: Milford, Connecticut
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I am not a trained mechanic but if you smell exhaust you have a leak somewhere and you are probably losing back pressure which could effect engine performance. I had a metal pipe-to-rubber hose seperation on a pipe that went from the catalytic converter back to the engine. My engine is a 4.2L so your layout might be different. It was very smelly and the car would not run smoothly until the clamp was replaced. You may also want to have the exhaust manifold checked.
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post #3 of Old 02-18-2002, 11:03 AM Thread Starter
92jeeper
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Thanks Islander89. After doing a little research my problem seems to be related to the exhaust manifold, possible leak or crack just as you mentioned. Thanks again!
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post #4 of Old 02-18-2002, 12:41 PM
jeepinarkansas
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heres another thought...I had a similar problem on my 95. Turned out to be a exhaust bolt right above the manifold. I sheared off the bolt head during a deep water crossing, i think, and that caused a smell and a loss of compression in my engine. Maybe that will help. Good Luck.
JAke

1982 Jeep Scrambler
5.3 Vortec
SOA on 37s
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post #5 of Old 02-18-2002, 04:18 PM Thread Starter
92jeeper
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Actually, when I had my muffler and cat. replaced, they pointed out a missing bolt on the exhaust manifold. I fixed that and it sounds a lot better but still has the smell. I've noticed on this website some reference to cracked exhaust manifolds. I'm thinking at this point I should have this checked out. I'll let you know what I find.
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