I have a 99 cavalier rs with a cold air intake, stainless steel header, magnaflow high flow cat, and a cat back exhaust, I bought brand new bosch oxygen sensors when I put my exhaust on. Now I'm throwing a check engine light with the code saying system running too lean. My question now is do I need to get my ecu tuned, or do I need to get bigger injectors, or turn up fuel pressure to get that back in to specs? I also have an air/fuel ratio gauge set up in the car and you can tell its running lean. I just want the check engine light off and it running back in specs.

Double posting is the devil.





i find it amusing that SHOoff has nothing better to do but follow me around & be an unhelpful dick in even cross-forum. - Jon Mick

You bought the universal bosch narrow bands didn you. Throw those in the woods and buy the narrowband for your car.


1994 Saturn SL2 Home Coming Edition: backup car
2002 Chevy Cavalier LS Sport Coupe: In a Junk Yard
1995 Mazda Miata R-package Class=STR
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