Engine Mechanical problem
1988 Jeep Cherokee 6 cyl Four Wheel Drive Automatic 193000 miles
In warmer weather my Jeep periodically " sticks" at max RPMs upon starting. Can be Corrected by disconnecting/re-connectiing the wire harness from the Stepper Motor while engine is running. Upon re-connecting harness idle returns to normal.
Stepper Motor replaced twice
All throttle linkages checked ok
TPS sensor replaced and factory set
My questions are:
" What sensor(s) would cause the stepper motor to max out the idle after starting?&Quot;
" What sensor(s) affect the stepper motor's potion in general?&Quot;
" What component(s) relay air temperature information to the engine during start up?&Quot;
Any suggestions are more than appreciated!
Sunday, March 7th, 2010 AT 5:45 PM