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91' Pontiac will not drive

the car will start and run but as soon as you give it any gas it will die.

You need to see a good independent mechanic and have the fuel pressure tested along with the fuel filter. Have them check the entire ignition system as well.

well i have replaced the fuel filter and the fuel pressure is good.

You might want to check your throttle position sensor. A bad one can cause this problem as well. It’s the link between your right foot and the ECM. The ECM controls fuel flow to the engine via the fuel injectors.