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 08-04-2005, 10:16 PM
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Originally Posted by LuxuriesPremier
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 ....
it might not be glowing...

basically the cat is a honeycomb filter... it falls apart and clogs itself...

mine actually got so plugged and hot it blew a hole in the side...

check it out
Old 08-05-2005, 11:07 AM
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my 90 rattles. I don't think its plugged though. It gets good mileage.
Old 08-05-2005, 06:35 PM
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Default Re: cat

Originally Posted by SSEBONNE4EVA
my 90 rattles. I don't think its plugged though. It gets good mileage.
sometime instead of clogging itself, it blows chunks out of the cat out the exhaust... then basically you have a SUPER HIGH performance cat...nothing in there... the rattle in there might be stuff that hasnt come out yet
Old 08-06-2005, 06:07 PM
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I did a real test yesterday on my mileage and i get about 20mpg average between highway and city. I guess thats normal but im still stuck on the performance issues of my car.
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