low rpm

  1. W

    Engine Chugging while Coasting

    Hi Guys, When driving my truck around 80-90km/h and if I let off the gas and begin to coast, the engine starts to make a chugging like noise. Also, I have been getting about 80% of my usual mileage. I have had the vehicle for about 30,000 miles and have not changed the spark plugs and that is...
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