Mechanics

CHEVROLET CAVALIER SENSOR PROBLEM

2000 Chevrolet Cavalier • 144 miles

Baught injectors at junk yard still blowing black smoke and runs rough idleing
AD
Avatar
Mikecon24
January 14, 2013.




What led you to the injectors? You know they didn't all fail at once. GM has a lot of injector problems but they almost always flow too little fuel. Black smoke is a sign of burning too much fuel. Usually that is because the Engine Computer is commanding too much fuel based on incorrect sensor readings. A sensor can partially fail and not set a diagnostic fault code, but most of the time a code will be set and the Check Engine light will turn on. Did you check for fault codes? If you did, what were they?

Caradiodoc
Jan 14, 2013.
Its reading code po191 I changed upper oxy sensor then did the injectors because it did not work

Tiny
Mikecon24
Jan 15, 2013.
P0191 – Fuel Rail Pressure Sensor Circuit Range/Performance

Is this the description you came up with? I've never run into this code before.

Caradiodoc
Jan 15, 2013.
Maybe it was po171 I have to check again to make sure.
AD

Tiny
Mikecon24
Jan 15, 2013.

AD