ok, i got my new headers (lt's) and 4'' catback on and the avalanche is lacking power bad, it was running ritch with shorties and dual 2.5'' exhaust but not like now. i am throwing a 332 code (knock sensor), can that make me run rich?, or is running rich causing the code? i am maxing out my wide band, it only goes to 10. i was wondering if anyone had any ideas before i bothered allin too mutch.
Last edited by st8kfinger; 07-13-2011 at 05:45 PM.
procharger p1sc, nelson tune, 42# marine injectors, walbro 255, lt's, ory, 4" volant cat back, PerformaBuilt level 2 pro race trans, trans. cooler with e fan, 2500 stall, aem wideband, energy bushings, spohn perf. trailing and panhard rods, mb & gear alloy 22's ( ya 2 sets, im big ballin), ss brake lines, drilled & slotted rotors, bla bla bla bla bla bla bla,
and ya it will beat a hemi.
the knock sensor is probably causing a lack of power due to timing being pulled.
it's a far stretch, but with less power, comes richer a/f ratio.
BUT, you changed to headers, so be sure the o2's are working correctly, that could be the cause of the rich condition, a faulty or misreading o2 sensor.
also, an exhaust leak before the pre cat o2's will cause a rich condition. the ltrims will be very positive, the pcm will keep adding fuel, and never satisfy the lean condition, so it'll run rich.
check those things out and let us know,
allen
Nelson Performance
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