Will an exhaust leak cause a rich condition?
Thread Starter
Launching!
Joined: Mar 2003
Posts: 238
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From: Castaic Lake, So. Cal.
Will an exhaust leak cause a rich condition? I am in the process of swapping out my Bassani Y-pipe with its ORP. Upon inspection, I noticed 3 or 4 exhaust leaks near the cats and O2 sensors. My car has been running pig rich even though I just had it tuned (no wideband O2) by AAP. Could this be my problem? Thanks for any input.
Re: Will an exhaust leak cause a rich condition? if the leaks were before the O2's then yes, it very may have.
and without a wideband O2, or EGT, how did your car get tuned...based off the best performance on a Dyno?
and without a wideband O2, or EGT, how did your car get tuned...based off the best performance on a Dyno?
12 Second Club
Joined: Mar 2003
Posts: 334
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From: jonesville, MI
Re: Will an exhaust leak cause a rich condition? Yes, it could. If the exhaust leak is upstream (before) from the oxygen sensor, the gases escape and never reach the sensor causing a false reading. Also, the pulses going by the leak could actually pull in the outside air and cause a false reading (depending on how bad the leak is).
Thread Starter
Launching!
Joined: Mar 2003
Posts: 238
Likes: 0
From: Castaic Lake, So. Cal.
Re: Will an exhaust leak cause a rich condition? It was tuned by monitoring the cars sensors with LS1 Edit and 6 dyno pulls. The major leaks are after the O2 sensor, but within 8 inches. I am finding so much wrong with my header/y-pipe installation (AAP), I am going to assume that I have leaks upstream and check all seals and bolts. Thanks for the help.
