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'03 Chevy 2500HD idling @ less then 300rpm?!

Discussion in 'Trucks and Trailers' started by nnj18, May 30, 2009.

  1. nnj18

    nnj18 LawnSite Silver Member
    Posts: 2,860

    anyone know why my truck is idling so low???! it JUST started doing this like an hour ago, i'm thinking the idle cable loosened up??
  2. Jason Rose

    Jason Rose LawnSite Fanatic
    Posts: 5,858

    Gas or diesel?

    Throttle position sensor maybe? I don't know if there's an actual mechanical way to set your idle rpm's, everything is ran by the computer.
  3. nnj18

    nnj18 LawnSite Silver Member
    Posts: 2,860

    Gasser....I'm going to double check my air and fuel filters...
    Posted via Mobile Device
  4. lyube

    lyube LawnSite Fanatic
    Posts: 6,598

    Bet it sips gas when it's idling...Free fuel saving feature from GM!
  5. nnj18

    nnj18 LawnSite Silver Member
    Posts: 2,860

    Posted via Mobile Device
  6. D8dozerboy

    D8dozerboy LawnSite Member
    Posts: 34

    Could just be a cluster problem does it sound like its running at 300rpm? I don't know that you could hardly keep in running at those rpms it would be running like hell.
  7. nnj18

    nnj18 LawnSite Silver Member
    Posts: 2,860

    No its def running at low rpm it stalled once
    Posted via Mobile Device
  8. nnj18

    nnj18 LawnSite Silver Member
    Posts: 2,860

    I just started it and its running at just under 1000 now....really wierd....
    Posted via Mobile Device
  9. pylnrcr

    pylnrcr LawnSite Member
    Posts: 41

    Try "resetting" the computer. Disconnect the battery for a hour or so, reconnect, and see what happens. I had a Jeep Liberty do a simular thing once and did that - it's ran fine since. Dunno if it'll help, but trying is free.

  10. J&R Landscaping

    J&R Landscaping LawnSite Fanatic
    Posts: 5,096

    It could be a throttle position sensor. How many miles on the truck?

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