catylic converter on 1996 bonneville ssei - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


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 03-20-2009, 05:12 PM   #1
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Post catylic converter on 1996 bonneville ssei

would it affect the performance in a negative way if i cut off the cat and replaced it with a straight pipe? I was told it would screw up the computer and the car would "shutter" when i got on the gas.
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Old 03-20-2009, 05:20 PM   #2
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posting in the right section will help you get a quicker response, the car will run lean because the rear O2 sensor will think that the exhaust is rich and pull fuel from the engine, so you need a O2 emulator, and there could also be legal issues if your state requires you to have one
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Old 03-20-2009, 05:34 PM   #3
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Moved to correct area.

Other then being illegal for street use? No, no real improvement to speak of other then being able to run leaded gas. You will also need to reprogram the PCM.
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