Quote:
Originally Posted by Nikzilla
Yes exactly! While cruising, under constant light throttle, the narrowband suddenly goes what the fuck rich and wideband goes what the fuck lean.
I cleaned the MAF last week. But there is NO fluctuations. Look at the screencap I posted. The MAF voltage, TP, RPM and Duty Cycle are all consistent. This is why I can't figure out wtf is going on.
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this makes me think you have an intermitten wiring issue. The O2 sensor where the previous owner wired it (IT NEEDS to be lengthened) is probably rubbing a 12V signal due to vibrations. Find the spot in your harness where the O2 sensor was wired and check how it was done. Probably with tape and twisty 1 2 3 method.
The only thing with this... the duty cycle of the injector should be dropping when the conditions present. I would only be a little bit- maybe .3% or something. But it
would be changing. See if you can increase the resolution of the duty cycle, or injector pulse width during the situation, look for a small adjustment down...
I cant read your screen shot, its very blurry. Have you tried to look at it? I cant tell one line from the other.