I have a 1995 grand prix that is running rich what some things look at
The mass air flow sensor and map sensor are what controls the amount of fuel thru the engine as well as the intake and engine coolant sensors.A vacuum leak will cause it to go lean and idle high. A bad sensor will make it think that its cold and make it go rich. A rough idle cold could be plugwires.Just when did this start?
not sure just bought the car that way they rebuild the whole top half of the motor
I would check for vacuum leaks to start
Looking for a Used Grand Prix in your area?
CarGurus has 3,715 nationwide Grand Prix listings starting at $1,100.
Search Pontiac Grand Prix Questions
Pontiac Grand Prix Experts