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Please Help-urgent Problem-truck Dies

Discussion in 'The Garage' started by 84gmcjimmy, Oct 27, 2006.

  1. 84gmcjimmy

    84gmcjimmy 1 ton status

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    I went to get insurance on the Jimmy today and it ran perfectly before I left. When I came back with the stickers and went to drive it, it stalls unless I leave my foot on the gas.
    I try to drive it, and as soon as my foot leaves the pedal to brake or put the clutch in, it dies. It's not driver error as it has never done this before.

    WHY IS IT ALL OF A SUDDEN NOT RUNNING?

    I played with the idle speed and it doesn't seem to change it at all. It has a good 1/8 of a tank of gas (more than it did before I had it running smoothly) so it cannot be gas. It stays running as long as I give it gas. As soon as I let off the needle falls on the tach and its no longer running.

    So, does anyone know why it would die like this for an unknown reason? It doesn't idle at all.

    Please help, I am seriously about to lit this on fire and be done with my troubles forever.

    Thanks in advance.

    S.
     
  2. Leper

    Leper 1/2 ton status

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    Has it been sitting for a while? If so you probably have a float stuck or a bunch of jelly in the carb. Please give more detail about the last time it ran well.
     
  3. ryoken

    ryoken Puppy Fabricator Premium Member GMOTM Winner

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    Yup, definitely a carb issue Steve...
     
  4. dremu

    dremu Officious Thread Derailer Premium Member

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    Can o' carb cleaner and some gas-anti-freeze-dry-out stuff ... spray carb cleaner in the carb (duh), and pour the anti-freeze stuff in the tank.

    If the gas has been sitting a while, it gunks up -- this is why the others have said what they said (which is all true! :) )

    Also check the fuel filter in the carb, and then throw it away and go with a (metal!) external inline filter.

    -- A
     
  5. k20

    k20 3/4 ton status

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    choke sticking perhaps?
     
  6. AZ79K5Project

    AZ79K5Project 1/2 ton status

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    Were you messing with anything under the hood? Any inspection under the hood? Wondering if you had a vacume line knocked loose.
     
  7. Chevy305

    Chevy305 6 Lug 14bsf Status Premium Member GMOTM Winner

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    definately sounds like a vacuum leak...
     
  8. peter redman

    peter redman Registered Member

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    had the same issue.turned out to be a vacum leak. used wd-40 to find it. turned out the gasket under the carb had gone bad.
     
  9. 84gmcjimmy

    84gmcjimmy 1 ton status

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    Using WD-40 to find the vacuum leak, while it is running? Does it make bubbles or what does a vacuum leak look like?

    Thanks
     
  10. 1979jimmy350

    1979jimmy350 1/2 ton status

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    use carb and choke cleaner spray around the carb if the engine speed changes thats where the leak is
     
  11. supersize75k5

    supersize75k5 OrganDonorRacing.com

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    ive had a carb gasket do the same thing,


    well since it has spark that leaves you with a fuel or air issue


    now which one is it is the problem:D

    any whistle like sounds?
     
  12. 84gmcjimmy

    84gmcjimmy 1 ton status

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    I can't really do that because without me on the gas, the truck won't stay running. Unless I get someone to stay inside the truck with there foot on the gas...
    I will see what I can do.
     
  13. Clod_King

    Clod_King 1/2 ton status

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    use a stick, or lean a brick on the gas pedal, with another brick behind it, and just adjust the "idle" you want, and start working on the truck.

    It worked for me when I had to run the old fuel through my truck. (and yes I realize there is probably a better way to get crap fuel out of a tank).
     
  14. dhcomp

    dhcomp 3/4 ton status Premium Member

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    I'm not a carb guy, but i would also check the fuel filter.
     

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