1988 Pontiac Trans Am this car runs real rich

1988 PONTIAC TRANS AM
149,000 MILES • V8 • 2WD • AUTOMATIC
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88BLUNDER
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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 ?
Nov 21, 2009 at 4:52 PM
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RASMATAZ
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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.
Nov 22, 2009 at 3:02 AM