GM Truck Club
Founded in 2004 ~ We're the #1 Chevy Truck & SUV Forum.
Silverado & Sierra | Tahoe & Yukon | Suburban & Yukon XL | SUV & CROSSOVER
Results 1 to 2 of 2
  1. #1

    Default rough idling on 02 Silverado

    When starting truck in cold tempatures rpms start at 1500. After about 3 seconds they move to 1000 to 900. After another 2 seconds down to 700 to 800 then truck shakes alot, sputters, really rough and almost sounds like its going to die. After 10 seconds of that the rpms stay the same or go down alittle but the roughness and sputtering goes away after the engine has warmed up obviously. I have had this problem the last 2 years but keeps getting worse every winter ( minnesota). I have changed the fuel pressure regulator the last 2 years, plugs and wires done around 60,000 miles ( truck currently is at 84,000 miles). Need help not to get screwed by auto business. Any advice would be totally appreciated.

  2. #2


    Your truck has a throttle cable and those trucks throttlebodys have a IAC, idle air control valve. These valves are mounted on the side of the t/body. The valve has a pintle that moves in and out to control idle. This pintle gets carboned up and needs to be removed and cleaned with throttlebody cleaner. I would remove the throttlebody and clean both sides with t/body cleaner and a soft toothbrush.

    2005 Chevy Silverado Z71 Crew Cab
    6" Skyjacker lift w/Edlebrock dual front remote resoviour shocks, single rear remote. Rancho skid-plate.
    17" x 9" M/T Classic Lock Wheels, 35" BFG A/T or M/T tires
    4.10 PercisionGears w/factory locker, T/A Performance rear-end cover
    Banks CAI intake, ported throttlebody, JBA coated headers, over-sized Magnaflow cats, Magnaflow cat back exhaust, Diablo tuned
    B&M aluminum deep transmission pan
    Warn brush guard w/Warn 9.5 XP winch, PIAA bulbs, Line-X bedliner, AWS Black tool chest, Extang tonneau cover
    Weather Tech floor mats
    Cover-Craft seat covers
    Dash mat cover
    Formula One window tint
    One black Lab in rear seat.

Similar Threads

  1. Egine runs rough while idling
    By Bear945 in forum General Chevy & GM Tech Questions
    Replies: 4
    Last: 09-12-2009, 03:21 PM
  2. Rough idling in Park or Neutral
    By willbradfan in forum GM Powertrain
    Replies: 8
    Last: 05-14-2009, 02:23 PM
  3. Idling rough....
    By hairysox33 in forum GM Powertrain
    Replies: 2
    Last: 02-02-2009, 03:26 PM
  4. 2005 tahoe idling rough
    By zach91 in forum GM Powertrain
    Replies: 4
    Last: 01-25-2008, 03:39 PM
  5. 92 Burban w/350 idling alittle rough
    By jbird in forum Chevy Suburban Forum (GMC Yukon XL)
    Replies: 4
    Last: 01-23-2008, 08:39 AM

Tags for this Thread

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts