MAF/IAT making car going to SD Stays Lean. Please Help!
I have a buddy who brought me a car that has been beating my ass. Its an ls2 with heads/ cam with an ls1 wiring harness in a 95 camaro. I know its a combo of the MAF/ DTCs. The MAF is LS2 Style and has to stay plugged in because it has the iat sensor integrated. I dont think its fully going in to SD it will run great for 20 mins good AFRs. then all of the sudden it will go into limp mode and run like absolute shit. I know its got to be something simple. When it goes into limp mode it leans out all the way and doesnt show anything on the wideband. Ive attached the tune any help would be appreciated.
Thanks
It just stays pegged lean all the way at idle/driving no matter what i do in PE and Open loop adding fuel it wont throw the fuel its commanding at it. Anyone?
Are you sure this is a global fueling issue and not one
cylinder misfiring or failing to shoot fuel? Any of that
will whack the wideband reading. Any hints in cylinder
misfire counts?
Well, then you should be scanning sensors and things like
spark and fuel adders to see what jumps across the change
from right to wrong. And misfires. Look to see whether both
NBO2s agree about lean, or just one bank's (which would be
confirmation of some individual cylinder or bank problem).
The car has a P0103 MAf code and an p0200 injector circuit. I know its because of the LS2 style maf. When i unplug it it wants to run better but the IATs are reading -38 deg. All sensors are working on scanner. Also can anyone verify that I have the right info for factory ls2 injectors in the tune. Not sure why im getting the p0200.
Thanks again for the help
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Originally Posted by ElecTech
