Re: XJ Revving Problem???
There are two potential problems. The first and most likely is the idle stepper motor on the TB. On shut down, the ECU moves this stepper motor into a postion to assist on startup. When the engine starts, the ECU uses this stepper motor to control idle speed. It operates the same as the idle adjustment on a Carb. In some cases it can get sticky which is why cleaning it helps.
The other posiblity (unlikly) is the TPS (Throttle Pos Sensor). It could be reporting a bad pos. Usually, this will also cause drivability problems.
84CJ7, 3"lift, 32"BFG, 4.10's, ARB Rear, Detroit Front, Solid Axle's, Durabak, York Air
They say we learn by our mistakes......I guess thats why we are all so smart.