RPM increases during idle

Discussion in 'Heavy Duty Diesel Truck Mechanics Forum' started by TheBigCat, Dec 10, 2017.

  1. B Sims

    B Sims Bobtail Member

    4
    0
    May 29, 2020
    0
    While idling my rpm jumps up and down slightly. I know it’s not doing a Regen though. It started when the weather got hot. What could be the problem?
     
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  3. B Sims

    B Sims Bobtail Member

    4
    0
    May 29, 2020
    0
    While idling my rpm jumps up and down slightly. I know it’s not doing a Regen though. It started when the weather got hot. What could be the problem?
     
  4. Truckers Report Jobs

    Trucking Jobs in 30 seconds

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  5. uncleal13

    uncleal13 Road Train Member

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    Apr 9, 2009
    Humboldt, Sk
    0
    What about the fuel quantity valve ? It causes rpm idle surging.
     
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