1990 Pontiac Firebird Repair Question
1990 firbird v6 3.1 oxygen sensor test wire
The purple wire
68 questions asked
I just checked my 02 sensore it is a single wire (blk) I just replaced it and it seems the car is running better,but it still idles a little rough and the rpm's jump a little between 700 and 750 at idle.also I notice vibration at idle,could this be due to a motor mount?
9 questions asked