Stock 3800 downpipe U bend cutaway pics - Page 4 - Monte Carlo Forum - Monte Carlo Enthusiast Forums


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  #31  
Old 06-24-2011, 11:02 AM
 
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What is everybody doing that uses the straight downpipe as far as defeating the o2 sensors? Doesn't it throw codes and check engine light?
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  #32  
Old 06-24-2011, 06:57 PM
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You don't delete both sensors- you actually want the front one to work still, but that is up in the rear exhaust manifold, so you shouldn't be touching it anyways just doing a DP install.

The only one that you can get rid of is the rear O2. You've got 2 options to get rid of the engine light- buy an O2 emulator which plugs into the old O2's plug and mimmicks a working O2 signal. Or option 2 is to either buy a tuned pcm from a vendor or have someone tune yours to turn it off.
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