Check the engine the TBI gasket under the TBI unit. Mine had a leak. you can check it by spraying carb cleaner abound the base when it is running. It will almost stall if it is defective. Also check the control modual under the cap and the wires from the pick up while you are there. I had many problems chasing my engine issues. I think I finally fixxed my problem with the intake manifold gaskets today
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Good luck!
Ingoldx1