archangelcomp: Your sample rates are very low on that palm datalogger, you might consider reducing it to RPMs, Knock, TPS, o2 front, o2 rear so you can get more samples. The narrowband o2 sensors agree that you're running rich only after a long idle. Your fuel trims are normal so it's not like you're past the ECU's fuel trim window. Any reason you didn't pick the emanage datalogger? It would be nice to see wideband AFR results and much faster sampling rates. Both o2 sensors read high so
if you had a defective fuel injector there would have to one on each bank. Secondly is it possible your FPR is overrun at idle?
Quote:
Originally Posted by Dj_Frost
Hmm, I understand how FP reacts with boost but what I'm still confused about is before cranking it. When the key is to the "on" position, is it ok that I'm at 19-20psi of FP or should it be at 44psi like it is on idle when I turn it on?
And when I take my foot off the accelerator I dont see it go to 20 AFR, it stays at like 10-12 so i've def got something wrong going on.
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It doesn't matter what your fuel pressure is before cranking. My fuel pressure drops to near zero after many hours of no use and during cranking the fuel pressure is restored and the car starts up normally. Also if your fuel pressure is 44psi at idle then your base fuel pressure isn't set at 44psi.
Use your emanage datalogger to verify your injector duty cycle or pulse width goes to 0 after coasting in gear with no accelerator.