Need advice on car running lean, along with ignition timing jumping at idle....please

[Perry V]

I took my car to get scanned today, and my car is running Lean, the iginition timing is jumping around quite a bit at idle and the codes the scan spit out are: PO171, 174 System Lean Bank 1, Bank 2.

I have the FFF turbo kit installed right now. I don't have the fuel pump installed just yet, but i'm not stomping on the gas so i don't that is the problem. Not to mention i ran a powerdyne supercharger in my car at 6 psi with no need to change fuel pump. Regardless I will install the fuel pump, but i want to iron out these problems first. My IAT sensor is just hanging in my engine bay, it is not taking a reading of the air entering the TB. That should be fine as well, I don't think that is throwing my car all out of whack.

Anyways, do you guys have any suggestion? My car was running like this even when i had the turbo off.

thanks I appreciate any help.

[ssms5411]

I would check your O2's first, and see what there running. I think that could throw things off.

[Perry V]

The mechanic told me that both o2's are reading the exact same thing. And he highly doubts that both of them died at the same time.

I think i'm going to take it to the dealer tomorrow to see what they say.

[ssms5411]

Good luck, let me know what they say, just in case it ever happens to me.

[Camaro2k]

I have the same problems (codes). but mine only come up when its relatively cold. Let us know what you find out.

[tdz16]

You say you put the FFF kit on. Are there any exhaust leaks between where the exhaust leaves the head, goes through the headers/manifolds, and hits the O2 sensors? That will throw off your O2 readings in the lean direction. If your 02's were dead you would get a DTC saying so and they would be slow to respond. Normal O2's should cycle rapidly up and down in an attempt to get to 450 mV which is stoich. If they are stuck in one spot or just very slowly cycling, then they're not workin right. Is your FPR hooked up right? You're ignition timing is also semi-controlled by the intake sensor, by having that chillin in the engine bay, the pcm may be playing with timing which in turn will effect your O2's, I'd get everything in proper working order first before you start guessing at whats wrong. Good luck and let us know how it turns out.