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erratic idle

  1. A

    Erratic/cycling idle

    Erratic/Cyclic RPM idle and Overheating problem About a week ago I started noticing the Ex idling erratically, with the RPM’s going back and forth or cycling between normal idle of about 600 RPM to about 1200 RPM every 3 to 6 seconds, sometimes a few more seconds longer in between. This...
  2. Z

    Erratic idle when engine is warm....92 Explorer

    Well.....I have a bit of a problem with my 92 Explorer that I'm hoping you guys can help with. A few weeks ago, when I went to start up my truck after it had been sitting for about 20 minutes, and the truck started surging.....going from 500 to 2000 rpm, back and fourth. The whole vehicle...
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