High idle in park

Tech topics for ZJ, WJ, WK and XK SUV models manufactured from 1993 to Present.
Posts: 2
Joined: Sun Nov 10, 2013 12:32 am
First Name: John
Last Name: Witham
Jeep Year: 2000
Jeep Model: WJ (1999-2004 Grand Cherokee)

High idle in park

Postby dominomanager » Sun Nov 10, 2013 2:13 pm

Hey fellow jeep owners.. Im new here and need some help with my 2000 wj 4.7. Ive seen my problem on jeepforum.com but have yet to find a solution. Here is my problem in a nut shell.
Truck idles at 1500 to 1700 in park. Ive replaced the IAC, TPS, Vacuum lines, and even the throttle body its self. I had the computer hooked up and it says the TPS is at 10% with key on and 75% WOT with key on. When I did a scan it has some C codes for wheel speed sensor fail. There aren't any check engine light on or ABS lights on. If I disconnect the battery for an hour it will idle fine until I drive it then it shoots the rpms back up to 1500 in park. If anyone has had the same problem that can help me out I would greatly appreciate the help.
Posts: 810
Joined: Mon Dec 14, 2009 4:56 pm
First Name: Adrian
Last Name: Dilley
Location: NW OKC

Re: High idle in park

Postby dilleywhopper » Mon Nov 11, 2013 6:34 pm

I'd try an ECM from pullapart.
Look at that, a SILVER Jeep!

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