Results 1 to 11 of 11

Car will not stay running

This is a discussion on Car will not stay running within the General Help forums, part of the LSx Technical Help Section category; ...

  1. #1
    Junior Member
    Join Date
    Mar 2011
    Location
    KY USA
    Posts
    5
    2002 Camaro Z28

    Car will not stay running

    Hello, I am having a problem that hopefully somebody else has had before and can offer advice on. My car is a 2002 Z28 automatic, completely stock, with 97,000 mles. A few days ago I started my car in the morning to let it warm up before driving (was 19 outside). It was idling fine when I locked it up and went back in the house. Came back out a little while later and it had died. It would restart, but ran rough and would only run maybe 5-10 seconds before dying. I got a ride to work, then tried again when I got home. Was still below freezing, and it started and ran for maybe 1-2 seconds before dying. Immediately after that, when I tried to start it, it would crank but not fire. It is now well above freezing and still doing the same thing. Like before, it will start and run for1-2 seconds, but only after it has been sitting for a pretty long time. On subsequent attempts it will crank but not fire.

    When this first happened, my first thought was frozen fuel line due to the cold, especially since it started at first - I was thinking it was using up the gas remaining in the engine and maybe the forward part of the line. But now it's like 60 and won't stay running, so that's not it.

    It seems kinda weird to me that it'll run for 1-2 seconds after sitting for a while. I can hear the fuel pump priming. It's almost like the fuel pump is sending just enough gas to let it run 1-2 seconds, but then won't send any more.

    I have a code reader and plan to check that, and plan to check for any blown fuses, but time is tight for me right now so I haven't done that yet.

    Any help or ideas would be appreciated!

  2. #2
    Smiles for 9.5 Years cammed goat's Avatar
    Join Date
    Jan 2009
    Location
    Paterson/Ridgewood, NJ
    Posts
    11,474

    Phantom Black Metallic
    2004 GTO M6

    Have you checked your fuel pressure? Have you checked your coolant temp sensor(on the driver side head near the manifold)?

  3. #3
    Junior Member
    Join Date
    Mar 2011
    Location
    KY USA
    Posts
    5
    2002 Camaro Z28

    No, have not checked the fuel pressure or coolant temp sensor. How does the coolant temp sensor fit into the picture? Why would that keep the car from running?

  4. #4
    ʢ ൧ ൨ ൩ ൪ ൫ ൬ ൭ ൮Ր Ց Ւ Փ Smittro's Avatar
    Join Date
    Feb 2009
    Location
    Pittsburgh
    Posts
    9,965

    White
    2008 Hummer H3

    Sounds like a dieing fuel pump to me.

    My 01 did exactly the same thing when the pump died.

    Let it sit and it would prime and start then die and would'nt start after that unless it sat for a while.

    Then it was just a repeat of starting and dieing then no start.

    I would do as Rich suggests and check your rail presure, should be ~ 58psi. for the ls1 +/- 2 to 10 psi. running.

  5. #5
    ʢ ൧ ൨ ൩ ൪ ൫ ൬ ൭ ൮Ր Ց Ւ Փ Smittro's Avatar
    Join Date
    Feb 2009
    Location
    Pittsburgh
    Posts
    9,965

    White
    2008 Hummer H3

    Quote Originally Posted by trophy421 View Post
    No, have not checked the fuel pressure or coolant temp sensor. How does the coolant temp sensor fit into the picture? Why would that keep the car from running?
    A faulty coolant sensor can fool the PCM into seeing an over heat condition even if the engine is cold.

    Durring an over heat while the engine is running the PCM pulls timing in reduced power mode to protect the engine.

    If the PCM pulls timing prior to start up it may very well not start or may not stay running if it does..

    However,, I would check rail presure first.
    Last edited by Smittro; 01-18-2012 at 09:21 AM.

  6. #6
    Junior Member
    Join Date
    Mar 2011
    Location
    KY USA
    Posts
    5
    2002 Camaro Z28

    Smittro, sounds like it may be the fuel pump dying since yours did exactly the same thing. I was thinking that since I could hear it prime the pump was OK, but maybe it's not dead, just has inadequate pressure?

  7. #7
    ʢ ൧ ൨ ൩ ൪ ൫ ൬ ൭ ൮Ր Ց Ւ Փ Smittro's Avatar
    Join Date
    Feb 2009
    Location
    Pittsburgh
    Posts
    9,965

    White
    2008 Hummer H3

    Quote Originally Posted by trophy421 View Post
    Smittro, sounds like it may be the fuel pump dying since yours did exactly the same thing. I was thinking that since I could hear it prime the pump was OK, but maybe it's not dead, just has inadequate pressure?
    Mine would prime, but the pump was weak and could'nt maintain adequite presure while running.

    I suspect that's what's going on here, but we won't know for sure until you pull a rail reading.

  8. #8
    Junior Member
    Join Date
    Mar 2011
    Location
    KY USA
    Posts
    5
    2002 Camaro Z28

    OK, thanks for the info. I am at work now but will plan to get a reading as soon as I can.

  9. #9
    ʢ ൧ ൨ ൩ ൪ ൫ ൬ ൭ ൮Ր Ց Ւ Փ Smittro's Avatar
    Join Date
    Feb 2009
    Location
    Pittsburgh
    Posts
    9,965

    White
    2008 Hummer H3

    Quote Originally Posted by trophy421 View Post
    OK, thanks for the info. I am at work now but will plan to get a reading as soon as I can.
    Ok, let us know what you find.

  10. #10
    Junior Member
    Join Date
    Mar 2011
    Location
    KY USA
    Posts
    5
    2002 Camaro Z28

    Sorry I never got back. The fuel pump ended up being dead. It's replaced now.

  11. #11
    ʢ ൧ ൨ ൩ ൪ ൫ ൬ ൭ ൮Ր Ց Ւ Փ Smittro's Avatar
    Join Date
    Feb 2009
    Location
    Pittsburgh
    Posts
    9,965

    White
    2008 Hummer H3

    Glad you got it running again!

Thread Information

Users Browsing this Thread

There are currently 1 users browsing this thread. (0 members and 1 guests)

Similar Threads

  1. Won't stay running
    By !!!FAST!!! in forum External Engine
    Replies: 10
    Last Post: 09-26-2009, 10:36 PM
  2. Won't stay running
    By !!!FAST!!! in forum General Help
    Replies: 7
    Last Post: 09-03-2009, 10:02 AM
  3. Help: Not wanting to stay running
    By 95Firebirdred in forum LT1
    Replies: 20
    Last Post: 02-10-2009, 03:53 PM
  4. Car won't stay running - help!
    By 408WS6 in forum General Help
    Replies: 6
    Last Post: 11-14-2006, 08:50 PM
  5. Car Won't stay running
    By dbd4ever in forum General Help
    Replies: 1
    Last Post: 04-08-2006, 01:39 PM

Bookmarks

Posting Permissions

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