1999 Jeep Laredo

Engine Mechanical problem
1999 Jeep Laredo 6 cyl Four Wheel Drive Automatic 123244 miles

i have a 1999 jeep grand cherokee laredo 4x4 4.0L. When I start it it revs all the way up and stays there it wond idle back down I have to shut it off
September 15, 2010.

Hi nathan24, Welcome to 2carpros and TY for the donation

Clean out the idle air control motor/passages and also test it- if it continues look for a vacuum leak. If you have to replace the IAC motor-make sure its the OEM part

Sep 16, 2010.