1993 FORD THROTTLE POSITION SENSOR 5.0
IF THE TPS SCREWS BACKED OUT FAR ENOUGH WOULD THIS
CAUSE THE IDLE TO RUN ROUGH MISS SURGE UP & THEN
DOWN . COULD IT ALSO CAUSE ENGINE TO RUN RICH.?
screw them back in and see if the symptoms go away. Clean the throttle body and IAC while your in there.
Sounds more like a problem with the IAC and throttle body. Remove, clean, and make sure IAC is working. Could also be a vacuum leak or problem with PCM.
Idle surge yes. Run rich no
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