Why does my 2001 f150 s rpms go up to 2000 when I put the truck in park or neutral,it drives great otherwise
2001 f-150 has started accelerating when it is put in park our nuetral but otherwise drives
Hello, In order: Something binding throttle blades; ie carbon, cable out of adjustment, bent accelerator pedal bracket, etc. Major vacuum Leak; at intake, hoses, etc. IAC Motor stuck open with carbon buildup... This is the valve that controls the idle speed by the ECM, located at the rear of throttle body. Good Luck, AskTrannyMan
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