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Re: 89 Grand Prix Stalling
Mobil 12 is right about the TCC solenoid problem. I would check for a vacuum leak as well since the car is surging. It is possible that the MAF sensor dirty and needs to be cleaned that will cause surging as well. Finally, you can remove the EGR valve and clean the passageways leading to the manifold. These will carbon up and cause a restriction to the EGR valve. The valve itself may not be bad at all.
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