High idle Jeep Cherokee

[Thursty]

I have a friend with a '89 Cherokee with a high idle issue. When he starts the Jeep cold it idles fine until it warms up. As it gets warmer the idle jumps to about 1700 rpm in park and 1,000 rpm in gear. We can find no vacuum leaks and when he unplugs the MAP sensor the idle goes down to where it should be. Any ideas?

Thanks in advance.

 

[gertsch]

Tps sensor, or even your map is bad.

 

[Bart]

TPS x2

 

[Thursty]

Thanks guys. TPS is what we are thinking. MAP was replaced earlier. Thanks for the help.

 

[Tobyxj]

Tps or the vac house to the map. I've also had a vac house from the "t" that goes to fuel regulator have a crack in it and do that I assume this is a renix motor

 

[Cherokeester]

TPS or vacuum leak I would guess as well.