RPM's suck high

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Apr 11, 2012 | 12:53 PM

JeepHeepYoda

Thread Starter

Seasoned Member

Joined: Jan 2012

Posts: 260

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From: Conifer CO

Year: 1998

Model: Cherokee

Engine: Inline 6

RPM's stuck high

Sometimes my rpms get stuck at 2500ish and just sit there revving high. Then I tap the gas and it will go back down. any ideas?

Last edited by JeepHeepYoda; Apr 11, 2012 at 01:08 PM.

Apr 12, 2012 | 06:08 PM

kjc

CF Veteran

Joined: Aug 2011

Posts: 1,031

Likes: 4

From: Blue Springs, MO

Year: 1993

Model: Grand Cherokee

Engine: 4.0L Laredo

Quote:

Originally Posted by JeepHeepYoda

Sometimes my rpms get stuck at 2500ish and just sit there revving high. Then I tap the gas and it will go back down. any ideas?

Clean the IAC valve.. check the TPS..

Apr 13, 2012 | 10:34 AM

JeepHeepYoda

Thread Starter

Seasoned Member

Joined: Jan 2012

Posts: 260

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From: Conifer CO

Year: 1998

Model: Cherokee

Engine: Inline 6

I cleaned the tps and looks ok...how can I tell if somethings wrong with my IAC?

Apr 13, 2012 | 10:37 AM

xj wheeler

CF Veteran

Joined: Jun 2011

Posts: 1,845

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From: S.E. Tx

Year: 1992

Model: Cherokee

Engine: 4.0 I6 firepower ignition, cat-back w/ magnaflow muffler, poweraid tb spacer, optima blue top

I would also clean the throttle body and make sure all the cables/linkage aren't binding.

Apr 13, 2012 | 04:36 PM

kjc

CF Veteran

Joined: Aug 2011

Posts: 1,031

Likes: 4

From: Blue Springs, MO

Year: 1993

Model: Grand Cherokee

Engine: 4.0L Laredo

Quote:

Originally Posted by JeepHeepYoda

I cleaned the tps and looks ok...how can I tell if somethings wrong with my IAC?

Pop off the cover and look at it.. Probably all dirty/carboned up. Easy to clean with an old toothbrush, but don't twist the pintle, i've read it can damage 'em. Make sure the seat is clean too.
*XX2 on what xj wheeler said about binding.. cables can fray as they age, or it might need some lube. Post what you find out.