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 4 of 4
  1. #1
    Newbie Daemon's Avatar
    Join Date
    May 2011
    Location
    Duluth, Minnesota, United States
    Posts
    4

    Question 92 Suburban idles up and down then dies.

    I have a 1992 'Burban k1500 4x4 that we ahve replaced every conceivable sensor,valve and pluig. Distributor has been changed, wires, plugs...the whole works. The truck just won't run right. We have adjusted the timing, changed the fuel filter but nothing has worked. It won't hold pressure after 1500 rpms. it goes up and down almost to the pint of stalling. If you put your foot on the brake it evens out. Don't know where to go from here and I don't want to scrap the Wife's baby. any one have any ideas?

  2. #2
    Legend
    murdog94's Avatar
    Join Date
    Feb 2008
    Location
    Cloquet, Minnesota, United States
    Posts
    8,198
    Blog Entries
    12

    Default

    have you run a fuel pressure test?? on the 92s you should have 13PSI min. Also have you checked for any vacum leaks?
    Mike

    Currently

    1997 Chevy S-10 Blazer 4X4 with 330K miles and counting (Hunting rig).

    2009 Saturn Aura XE (wifes car)

    2011 F-150 Crew 4X4

    "Hold it to the floor till you see God.... Then Brake!!!!"

  3. #3

    Default

    Have you checked/cleaned the IAC valve. This helps to control idle. If its dirty/cummed up it can't move in and out.

  4. #4
    Newbie Daemon's Avatar
    Join Date
    May 2011
    Location
    Duluth, Minnesota, United States
    Posts
    4

    Default

    that is the next after the brake booster. When it is hooked up and the brake is applied it evens out the idle. So I disconnected the vacuum line from the booster and it runs fine. It won't hold idle though, I believe it is to low with the vac line off and when it kicks down it drops too low to stay running.

    ---------- Post added at 07:17 PM ---------- Previous post was at 07:13 PM ----------

    We replaced the IAC today as well as cleaned the EGR valve

Similar Threads

  1. starts, idles rough, then dies when I give it throttle.
    By oc_tahoe in forum Chevy SUV & Crossover Tech Forum
    Replies: 2
    Last Post: 12-23-2010, 07:53 AM
  2. '02 Suburban dies under load / power
    By kbroderick in forum Chevy Suburban Forum (GMC Yukon XL)
    Replies: 6
    Last Post: 10-21-2010, 10:40 AM
  3. 2004 Suburban dies while driving
    By skiboat in forum General Chevy & GM Tech Questions
    Replies: 0
    Last Post: 06-28-2010, 05:06 PM
  4. 01 Suburban 8.1 dies
    By HI-TORQ in forum GM Powertrain
    Replies: 2
    Last Post: 05-08-2010, 09:43 PM
  5. 2004 Suburban Dies on the highway
    By jsamotis in forum General Chevy & GM Tech Questions
    Replies: 6
    Last Post: 09-05-2008, 09:48 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
  •