Strange idle while coasting...
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Seasoned Member
Joined: Aug 2010
Posts: 330
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From: Grand Junction, CO
Year: 1999
Model: Cherokee
Engine: 4.0L I-6
Strange idle while coasting...
Hey guys,
This is a new one to me. I'm noticing that on my drive home from work, my coasting idle jumps 2 to 300 RPMS with no input from the throttle. For example, I can be coasting down a hill at 45MPH, the tach will start jumping sporadically. I don't hear the engine laboring under the effort, vehicle speed doesn't noticeably change. I don't recall it happening during warmer weather, but I wasn't paying attention to it then.
Ideas?
This is a new one to me. I'm noticing that on my drive home from work, my coasting idle jumps 2 to 300 RPMS with no input from the throttle. For example, I can be coasting down a hill at 45MPH, the tach will start jumping sporadically. I don't hear the engine laboring under the effort, vehicle speed doesn't noticeably change. I don't recall it happening during warmer weather, but I wasn't paying attention to it then.
Ideas?
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