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I have a 1989 jeep cherokee that idles real high. Cannot find out why. It has a 4.0 and I dont think it has a check engine light . IS this possible? How would I get the codes?

Submitted: 1348 days and 3 hours ago.

Category: Car

Value: $10

Status: AWAITING CUSTOMER ACTION

Answer

check the iac motor (idle air control). this is licated on the throttle body it is a electric motor that steps in an armature and alows air to come thru at idle. we see a lot go out and a lot build up with carbon. also check for exhaust leaks at manifold. in some years the intake manifold bolts would loosen and cause a vacuum leak there. try spraying brake clean on intake. be careful not to spray on or around hot exhaust.

Accepts:
Expert:	kelly
Pos. Feedback:	100.0 %
Answered:	3/15/2006

Auto Mechanic

10 years of jeep dealership experience

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I have a 1989 jeep cherokee that idles real high. Cannot find out why. It has a 4.0 and I dont think it has a check engine light . IS this possible? How would I get the codes?

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