Mechanics

THIS CAR RUNS REAL RICH

1988 Pontiac Trans Am

Engine Performance problem
1988 Pontiac Trans Am V8 Two Wheel Drive Automatic 149000 miles

the car has the 305 tbi engine in it, it runs real rich, I have replaced the spark pluggs cap and rotor, pluggs I have gone through 2 oxugens sensors" due to the rich condition " I have checked for vaccum leaks and there are none, I just serviced the injectors, rebuilt the throttle bodie unit " new diaphragam filters and gaskets" new map sensor. It just dumps too much fuel I dont know what other sensor it could be btw I have no codes in the ecm so im stumped what could it be?
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88blunder
November 21, 2009.



Possible causes include a bad O2 sensor, excessive fuel pressure (bad fuel pressure regulator or plugged return line), leaky fuel injectors, dirty air filter or restricted air inlet, or a defective coolant sensor that prevents the engine management system from going into closed loop mode.

Rasmataz
Nov 22, 2009.