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fuel pump?

Discussion in 'General Chevy & GM Tech Questions' started by Lunatic, Apr 25, 2012.

  1. Lunatic

    Lunatic New Member

    i have a 2000 jimmy,and i got the call from the wife telling the truck wont start shes stuck at work. when i got there i had an idea it was the fuel pump because the night before the car wouldnt start,but after a few min it started,today it will not turn over.
    i cant hear the pump prime when i put the key on run.the car is cranking fine and shows no signs of catching or wanting to catch,im very sure its a fuel issue. i had no tools or much time to look at it when i picked her up,i quickly swapped the fuel replay under the hood with another relay and nothing changed so i can rule out a relay issue.before i spend a million dollars on a fuel pump and all the BS involved getting it out,does anyone have any other ideas what it could be? like maybe a bad ground? ECU issue? anything that might be common with these trucks to check first? thanks.
  2. MrShorty

    MrShorty Epic Member Staff Member 5+ Years 1000 Posts

    Can't think of anything else real common. But, before I spent a million dollars on a fuel pump I'd:

    Check fuel pressure to make sure it is a fuel delivery issue.

    Check for spark.

    Pull codes from the computer (in case there is usable information in the computer's memory).
  3. Lunatic

    Lunatic New Member

    ive read about people replacing pumps only to find it was a different problem,sometimes ground sometimes a fuse.something tells me this is gonna be a serious pain in the a$$.
  4. moogvo

    moogvo Epic Member 5+ Years 1000 Posts

    If you can't check your fuel pressure, bang on the tank a few times and see if it will start. if it does start, you have a fuel pump problem. What about your fuel filter? When was teh last time that was changed? Pull it off and try to blow through it. if you can blow through it, it is fine. If not, replace it!
  5. ntbush83

    ntbush83 Rockstar 4 Years ROTM Winner 1000 Posts

    X2^^ check fuel filter!! Always replace it before the pump! Cheap check! If thats not it then yeah I'd say its the pump. You can try beating on the tank with a soft hammer while turning the car over and sometimes that'll at least get it started.
  6. Lunatic

    Lunatic New Member

    thats what i did.i went down after dinner with a hammer and my cell incase a tow truck was needed. i tried to start it and nothing,so 2 bangs of the hammer and the pump primed,started her up drove her home. so i guess new pump it is. 400 and change for the part.lovely.
    i remember changing my camaro fuel pump in 20 min and it cost me 20.00 lol
    aint technology great.
  7. sstoner911

    sstoner911 Epic Member 5+ Years 1000 Posts

    One thing I would do is check the connections at the top of the tank and ensure everything is secure. I have heard of guys dropping the tank to only find out the connections where loose or bad. Worse case you still need to replace the fuel pump.

    I had a co worker get a quote to change a fuel pump - $900.00 at the dealer....thats probably 5 hours of labor according to their handy dandy book but really only takes 2-3 at most.
  8. moogvo

    moogvo Epic Member 5+ Years 1000 Posts

    Sucks that it is the pump, It could be a bad connection as sstoner said. either way, great that you're in the ball park!

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