92 SSEI "Uneven" power ??? - Page 2 - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat
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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.

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Old 07-28-2003, 02:06 PM   #11
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Originally Posted by TelePlayer
No, I am not talking about a downshift.
It has plenty of power, it just doesn't come on all that smoothly.
I haven't noticed any strage boost conditions.
My cat converter does have loose pieces in it that I can hear rattling around. It'* all welded up, so how does one go about working on this exhaust system?
Typically, a blocked exhaust (e.g. partially clogged convertor) is identified by measuring the intake manifold vacuum; the service manual should explain where to connect a vacuum gauge and what sort of readings should be seen during the test.

When the convertor clogged on my old '82 Cutlass, a friendly Car-X dealer unbolted the convertor/pipe assembly (from exhaust manifold to muffler) and let me test-drive the car without the convertor in place, just to verify that it was in fact the convertor that had clogged, before I spent the money on a new one.
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