creaper

iTrader: (13)

I just purchased this car this past week. First off it is a 2001 camaro z28 with a procharger on it, full exhaust with o2 sims. I am having a problem with two codes. p0171 and p0174, System Too Lean (Bank 1 and 2). I have looked at the MAF and it is clean as far as i can tell but plan on spraying it with some brake cleaner here soon. Also looked to check for any vacuume leaks but have not found any. I do have the autotap system but unsure what the correct values i need or which ones i need to be looking at. Also has an aftermarket fuel pump that came with the procharger installed and is reading 60 psi, has a boost guage that reads 30psi of vacuume when idle and goes up as i hit the gas, and has a air/fuel guage that stay pegged out on rich. When i first got it the A/F would move around like normal but now it doesnt. Somebody help me out here.

creaper

iTrader: (13)

cleaned the MAF and still same problem.

wait4me

iTrader: (10)

sounds like you might have a bad fuse for power on the o2s, Or you killed them from running too rich, or the tune is just way off.

creaper

iTrader: (13)

where would i find the fuse for the o2's?

2001NBMZ28

Just for the heck of it check the ENG SEN fuse - MAF and 02 are on the same circuit.

creaper

iTrader: (13)

checked my fuses in the cab and the two boxes under the hood and they are all good. Didn't see a fuse labeled for the O2 sensors though.

creaper

iTrader: (13)

anybody else wanna help me out? i already checked all the fuses and none were popped and also checked all the vacuum lines and didn't find any disconnected or loose.