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WHAT WOULD CAUSE MY 89 FORD F150 302 ENGINE TO RUN WELL AT HIGH AND LOW RPM WHILE IN PAR OR NEUTRAL BUT RUN AWFUL IN GEAR. I HAVE CHANGED THE FUEL FILTER, CAP, ROTOR , PLUGS, WIRES, PCV VALVE , EGR VALVE,THROTTLE POSITION SENSOR AND CLEANED THEAIR BYPASS


you might have an injector

you might have an injector clogged

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