GM Truck Club
THE PREMIER CHEVY TRUCK & SUV FORUM
Founded in 2004 ~ We're the #1 Chevy Truck & SUV Forum.
Silverado & Sierra | Tahoe & Yukon | Suburban & Yukon XL | SUV & CROSSOVER
Results 1 to 7 of 7

Thread: miss at idle

  1. #1

    Default miss at idle

    i have a 2005 gmc desial that runs great most of the time, but some times at idle it starts to miss really bad. only some times the rest of time it seems fine. the truck does have a k and n air filter, ( which has been cleaned.) and oil and fuel filters have been changed. also has super chip i have not tried changing settings on that to fix the problem. let me know if that could be it, any other help would be appricated

  2. #2

    Default

    sounds something like an injector to me. my dads diesel has went through several injectors, it's a common problem. they are some kind of expensive by the way!!! hopefully your problem is something else!! good luck
    Scott-Mississippi
    1996 Silverado
    *Mostly stock for now
    *Soon to be airbag project..

  3. #3

    Default

    when u say "miss" do u mean it feels like its ready to bog out? ive noticed my 5.3 2006 1500 will do this every so often at idle as well.. no engine mods or k&n on mine yet tho.. also seeking info...

  4. #4

    Default

    Could have fuel in the lines. I am a Diesel Mechanic for the RR and that is the problem 8 out of 10 times with our engines. Make sure your fuel filter is not sucking air. I dont know how your set up is but you can tell if it is sucking air if you look at your lines at or you filter when the vehicle is being primed. I dont work on automotive diesel engines. So if anyone out there could tell the procedure for his vehicle it might help him to get the problem fixed.
    08 silverado
    4.8
    K&N cai
    single in dual out cherry bomb pro
    leveling kit
    custom painted bow ties
    Bed liner
    Tinted windows
    20inch Cruser Alloy Switchblades
    Goodyear Eagle GT2 285/50/20
    1 truly heavy foot + Wait4meperformance SCT Handheld
    100 shot of Nitrous Dyno tune system
    SS front bumper
    Matching painted front grill and bow ties

  5. #5

    Default

    Quote Originally Posted by heavy chevy View Post
    Could have fuel in the lines. I am a Diesel Mechanic for the RR and that is the problem 8 out of 10 times with our engines. Make sure your fuel filter is not sucking air. I dont know how your set up is but you can tell if it is sucking air if you look at your lines at or you filter when the vehicle is being primed. I dont work on automotive diesel engines. So if anyone out there could tell the procedure for his vehicle it might help him to get the problem fixed.
    i agree, i wasn't thinking about that. you're more than likely sucking air somewhere....more than likely around the fuel filter, it may not be getting a proper seal around the rubber.

  6. #6
    Legend Mean_Green_95's Avatar
    Join Date
    Apr 2009
    Location
    Baton Rouge, Louisiana, United States
    Posts
    1,170

    Default

    try popping open the fuel filter, just enough to let out the air, and while it is open, try priming the fuel system. This will insure that you got the air out if there is in fact any air in the filter. I had to do that to a F-250 at work a couple months ago after changing the top filter.
    2010 Equinox LT
    2.4, 6 speed auto, power lift gate, remote start, bluetooth, xm.

    1995 Cheyenne C1500 ext. cab(my baby, my first truck)
    5.0, 5 speed, Silverado appearance package, power nothing, bucket seats and console Silverado, painted black interior, eBay halo headlights, eBay chrome tails, eBay cai, dual Flowmaster 40's w/no cats, 15x7 American Racing Hopsters, Walmart fog lights, SS mirrors

  7. #7

    Default update

    thanks for all the help, i will go out and check and see it i am sucking air, also another thing i also noticed is that i am starting to hear that "knock" like when an injector is going out, but only when it is acting up. cause sometimes it runs fine, with no problems at all. when i hear that knock it points me to injector failure, but i have never seen a" knock" come and go. so i really do not want to jump into an injector if thats not going to be the problem. could air in the system cause that knock? thanks again.

    also check engine light never came on during any of this...

Similar Threads

  1. Replies: 4
    Last: 07-25-2010, 10:17 PM
  2. Low idle miss...
    By daddytech in forum General Chevy & GM Tech Questions
    Replies: 2
    Last: 01-13-2010, 06:54 PM
  3. Need help with miss on 99 k2500-5.7L
    By 99blueburb in forum GM Powertrain
    Replies: 5
    Last: 11-19-2007, 08:45 AM
  4. help with miss on 99 K2500 with 5.7L
    By 99blueburb in forum Performance & Fuel
    Replies: 4
    Last: 09-24-2007, 11:09 PM
  5. miss on 99 k2500 with 5.7L
    By 99blueburb in forum Chevy Suburban Forum (GMC Yukon XL)
    Replies: 0
    Last: 07-24-2007, 08:42 PM

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
  •