chugs

  1. Ranger Idles fine but RPM gauge fluctuates while driving

    Hi all, I have a 1999 Ford Ranger 4.0L V6. My truck’s RPM gauge will fluctuate and if I don’t give it some gas it will stall. While this happens the truck feels like its chugging. It idles just fine (1000 RPMS). I took it to an auto shop and they couldn’t get the problem to repeat. They said...

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