Sometimes, cold or warm, my 87 4.0L Cherokee idles as fast as
3,500 RPM. Pulling up on accelerator does not help. O-rings have been replaced. I was thinking of cleaning contacts on computer and cleaning the throttle body next. Any other suggestions? Anything else to clean while I have the TB off? My 87 Clymer shop manual doesn't really have any info on cleaning the TB Thanks DeanOurs does that every couple years and I clean the contacts on all the switches on the throttle body, particularly the TPS connection with a spray contact cleaner. WD40 will work in a pinch, but an electronic cleaner is better.
I then use some spark plug boot protector type dielectric grease on the plug seal.
Lasts a couple years normally.
Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00 88 Cherokee 235 BFG AT'sDDKreiter wrote:
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