1992-1999 Series I L27 (1992-1994 SE,SLE, SSE) & Series II L36 (1995-1999 SE, SSE, SLE) and common problems for the Series I and II L67 (all supercharged models 92-99) Including Olds 88's, Olds LSS's and Buick Lesabres Please use General Chat for non-mechanical issues, and Performance and Brainstorming for improvements.

Leaking exhaust?

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Old 08-03-2005, 06:59 PM
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Yes the car is sluggish until the boost kicks in just right thne it takes off quicker. The cat i never checked it after driving and my temps are always at around 180 to 200 never much higher. I never really hear rattling or maybe what i do hear from the engine is actually coming from the cat. How much does a good cat cost? since my cousin can install it for me.
Old 08-03-2005, 07:01 PM
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lol ill record the sound i hear tonight and the pros can tell me if it is or not. Would a bad cat explain bad mileage and shitty performance off the line?
Old 08-03-2005, 07:56 PM
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im putting money on the clugged cat as told already, or a bad dount gasket between the header and the exhaust pipe...
Old 08-03-2005, 08:02 PM
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A bad cat is the same as plugging the tailpipe in most cases. You have trouble pushing exhaust out. So it takes more fuel to do it.
Old 08-03-2005, 09:23 PM
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like i said, after you run it some, and actually get the rpm'* up, and the engine up to temp, look under the cat and see if it is glowing.
Old 08-04-2005, 12:17 AM
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Wouldn't i notice a glowing piece of metal lol??? i mean how hott does the cat get if ts malfunctioning. I also do smell burnign at times whe ni get otu of the car idk if thats normal.
Old 08-04-2005, 12:20 AM
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Originally Posted by LuxuriesPremier
Wouldn't i notice a glowing piece of metal lol??? i mean how hott does the cat get if ts malfunctioning. I also do smell burnign at times whe ni get otu of the car idk if thats normal.
very hot...also, you have to look under the car to see the cat, so dont be so sure lol
Old 08-04-2005, 01:07 AM
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lol ok cool ill check tommrow morning after my long trek to work in the 90 degree weather
Old 08-04-2005, 01:17 AM
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Kick the cat and listen for rattles. Inspect your plugs, they can tell a story. Check your tire pressure.

My 95 just got 18mpg during WCBF, and you know how we were driving, not just track time either.
Old 08-04-2005, 07:53 PM
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So the plugs should look dry right not wet or white. If there good
kcik the cat if it rattles it is no good ? or is it just loose or something where u can fix that without buying a new one. I looked under the car today and it wasnt glowing ....


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