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Discussion Starter #1
1991 jeep YJ idle rough. New plugs, wires installed. Distributor good. Sounds like a miss at idle. Not much power on highway and bad gas mileage (200 miles per tank). Any ideas? TPS maybe or bad valve? Except for loss of power on hills and bad gas mileage, seems to run along fine except at idle. Idle seems to be getting worse. Any ideas?
 

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Discussion Starter #7
Its a 2.5 liter base model. Its jumping slightly, only at idle. If you weren't looking at the tack, it would be almost un-noticable.
 

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Hmmmmmm ..... I have a problem with my staying up around 1300 after a long drive, after a while it will then drop to around 800 when sitting. What's your resting RPM ?
 
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