Chevy and GMC Duramax Diesel Forum banner
  • Hey Everyone! Enter your ride HERE to be a part of this months Ride of the Month Challenge!

engine surging

  1. 911 Problems Forum
    What would cause the truck to lightly lope or surge when idling? Its hardly noticealbe but definetely there. Truck is all stock except a 4" exhaust system- no programmers or tunes.
  2. 911 Problems Forum
    so i have noticed lately that when the truck is warm and idles down the rpms surge about 50 or so rpms so the gauge says. no egine lights are on or anything like that. also i have noticed my gas mileage decreasing and im driving the truck like i always do. im pretty new to the diesel world but...
Top