my car running rich what would make it run rich?

A bad O2 sensor. How do you know it's running rich?

2002 Cavalier 2200 5spd

Solid Snake wrote:A bad O2 sensor. How do you know it's running rich?

my muffler is soild black inside and my narrow air/fuel guage is going green




Edited 1 time(s). Last edited Tuesday, July 25, 2006 4:58 PM

That mean it's normal. If you ever see a car with a clean muffler, don't buy it.

Also, the narrowband is not good enough to say your car is running rich. The car run rich from factory as a protection.



Gilles
2.3 Ho

Our cars only run rich at WOT or when cold. Otherwise, pretty close to 14.7/1. My muffler isn't black on the inside. That's definitely abnormal. Maybe one of your injectors is injecting more fuel than another? If one of your cylinders is running lean and dumping O2 down the manifold, the other three cylinders will run rich. Try some injector cleaner or seafoam.

2002 Cavalier 2200 5spd

i think i'll get a new O2 first i haven't changed that since i got the car