zayne0

running a 92 camaro with 5.3 tahoe engine/ls6 intake. running efi live and found that it stays in open loop operation and fuel trims always register 0. was told that the wiring on the o2's was wrong and needed to be fixed. Anyone got any info? how do i trouble shoot this? would a wiring schematic of the o2's root out the problem or would it be something deeper?

Old Geezer

iTrader: (3)

What harness do you have? A modded stocker, or?
O2's reading at all?
O2 plugs swapped side to side?

zayne0

Man i sent my harness to a place and had it done for 1000$ and got it back and ended up having to do myself. I dont know for sure how to tell if i have the sides swapped i have no schematic for it. When i got it back i didnt disturb any of the o2 wiring. It is the harness that came with the engine also same computer.

edcmat-l1

iTrader: (10)

Post a data log showing your O2s, the fuel trims, and all other pertinent pids. Coolant temp, IAT, TPS, RPM, etc., etc.

zayne0

let me know if this will work

edcmat-l1

iTrader: (10)

Looks like the O2s are unplugged, or the connectors have an issue, and there's no contact there. That's your CL problem.

PS, you need to be logging your short term fuel trims too. Not that it matters on this log.