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 2 of 2
  1. #1

    Default 1998 GMC 5.0 - Still Struggling

    I am still trying to get my 1998 GMC running. If you didnt happen to catch my previous post my son was driving it last weekend and it died on him at about 35mph and would not start back. I assumed the fuel pump but when I got to it I could hear the pump come on as soon as the ignition switch was engaged. It turns over fine and I have spark to the plugs. I have replaced the cap and rotor (didnt know if they needed it or not) but that didnt help either. The plug wires and plugs are relatively new. I replaced the ignition control module also with no help there.

    Someone suggested I use a paperclip in the "5 & 9" pinholes of the obd to see if I got any codes flashing and assuming I did that properly there are no codes. The light comes on but does not flash. I poured a little gas in the throttle body and it tries to catch with that but will never actually fire up. I am stumped and dont want to just go changing parts.

    Any thoughts?

  2. #2

    Default

    Quote Originally Posted by tunnelgas View Post
    I am still trying to get my 1998 GMC running. If you didnt happen to catch my previous post my son was driving it last weekend and it died on him at about 35mph and would not start back. I assumed the fuel pump but when I got to it I could hear the pump come on as soon as the ignition switch was engaged. It turns over fine and I have spark to the plugs. I have replaced the cap and rotor (didnt know if they needed it or not) but that didnt help either. The plug wires and plugs are relatively new. I replaced the ignition control module also with no help there.

    Someone suggested I use a paperclip in the "5 & 9" pinholes of the obd to see if I got any codes flashing and assuming I did that properly there are no codes. The light comes on but does not flash. I poured a little gas in the throttle body and it tries to catch with that but will never actually fire up. I am stumped and dont want to just go changing parts.

    Any thoughts?
    Just because you hear the pump does not mean it is actually pumping anything. I would check for fuel at the fuel rail, and make sure it is under pressure there.

Similar Threads

  1. Lutz's legacy in hands of struggling GM
    By ChevyFan in forum The Coffee Shop ~ Chit Chat
    Replies: 0
    Last: 03-04-2010, 09:50 PM
  2. GM Still Struggling to Gain Traction - BusinessWeek
    By ChevyFan in forum Other GM Cars
    Replies: 0
    Last: 10-08-2009, 03:41 AM
  3. I have got some problems with my 1998
    By murphys 98 in forum GM Powertrain
    Replies: 3
    Last: 08-18-2009, 05:39 PM
  4. 1998 Z71 Tires
    By tylerhodgson111 in forum Wheels & Tires
    Replies: 5
    Last: 05-03-2009, 05:37 PM
  5. Ford struggling in midsize sedan segment
    By ChevyFan in forum The Coffee Shop ~ Chit Chat
    Replies: 0
    Last: 07-11-2007, 11:00 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
  •