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mark '87 930 mark '87 930 is offline
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Join Date: Feb 2006
Location: Toronto, Ontario
Posts: 727
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This is just something I'm putting out there, but on mine I have it unplugged as well as it runs poorly under boost with the O2 sensor connected. My thought/theory here is that the O2 sensor bung position on the new headers (I run GHL's with heat) is that it's way to close to the Turbo (only a few inches before on mine) thus giving false conditions. When I ran the stock headers, the O2 sensor did it's job and really ran well. In fact, it had much better low RPM throttle response with the 02 sensor connected (I'm thinking it was because the car wasn't running as rich as before).

I ran an lm-1 and adjusted it accordingly without the O2 sensor and now have never looked back. There are no misses and the idle is very smooth.
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1987 930
1956 Chevy 3100
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Old 09-28-2007, 05:50 AM
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