Hellom to all: My 1991 F-150 5.0 is giving me grief, I was having problem with the way the engine ran, I have put in new plugs,wire ,cap,rotor, EGR valve, and Idle solenoid valve. After I the egr and idle solenoid valve the idle just ramps from 100 to 1000 rpm constantly, The onlt thing I did not change is the oxygin sensor because I can not free it from the exhaust pipe. Dose anyone have any ideas.

Thanks
Lou

 

was it doing this prior to changing all of those parts?