RPM stay at 1500

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12-31-2014, 09:53 AM

ericgsc

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Model: Cherokee

RPM stay at 1500

Hi Guys,

I trying to search from the old posting but couldn't find.

My Cherokee RPM straight away swing to 1500RPM after turning the ignition key on. What could be the issue here? I just changed the TPS and I did not realised when the problem started. Anyone can help?

Thank you..

Eric

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12-31-2014, 10:26 AM

Nick-B

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Location: Key Peninsula, WA

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Year: 1997

Model: Grand Cherokee

Engine: 4.0

Hi Eric,
It would really help if we knew more about your Cherokee, like the year and engine.
When you replaced the TPS did you adjust it for proper reading? A high idle like that is often caused by vacuum leaks. Check all the vacuum hoses and connections and check your intake manifold bolts for tightness. When I first got my XJ, the intake manifold bolts at the head were loose and I had a real high idle too.
Best of luck.

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12-31-2014, 01:35 PM

bender32

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Location: Kentucky

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Year: 2001

Model: Cherokee

Engine: I6

I had the same issue and it turned out to be a vacuum leak.... The rubber fitting on a vacuum line that connects to the intake manifold had deteriorated and fell off. That's where I would start!