high idle

Hello jeepz users, I've had a problem with high idle for a few days now. I have replaced IAC valve, MAP sensor, and TPS. There for awhile it would idle anywhere between 1100 and 2000 if gas pedal is pressed and released it jumps to 3000 and stays there. I've checked for vacuum leaks and...

Needing help got a 99 grand original motor quit after #4 piston cracked in half bought a used 4.0l motor 2003 jeep grand and installed it on start up eng. Revs up to 5k rpm and stays new timing chain trottle body sensors new cam sensor new crankshaft sensor. New ecm comupter No noticable...

I tried to start my 97 TJ yesterday and failed to hold the key over to start long enough. The engine coughed back through the intake; I started it a few moments later and it raced at 2K rpms. I disconnected the negative battery cable and left if off for a couple of minutes to see if the...

89 jeep cherokee was idling higharound 3500rpm. I replaced the IAC and it still went high, then i replaced the TPS and it works fine. When starting it idles at 1000rpm then slowly warms to 1500rpm and tops out at just under 2000rpm. I have checked for vacuum leaks and found none.So i changed the...