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Thread: Well I figured out what my fuel pump problem is

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  1. #1
    Join Date
    Sep 2006
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    Coon Rapids, MN
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    cody you have mail

    04 Grand Prix GTP
    03 Z71 wanting a Turbo ,Stall, and Tune BAD
    THE SURGEON GENERAL SAYS NOTHING ABOUT SMOKIN A FORD

  2. #2
    Join Date
    Feb 2005
    Location
    Austin, Texas
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    Quote Originally Posted by 02CHEV View Post
    cody you have mail
    Where? I dont have a PM or email.
    2007 CCSB Z71 VortecMax: Stock!

  3. #3
    Join Date
    Feb 2005
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    Austin, Texas
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    Copy paste from my pt post, I dont know what the hell is going on

    Yes the ECMB fuse is good. Here is what happened. I spliced in the new "updated" plug then plugged in the FP and you could hear it come on, so I dropping the bucket in the tank, hooked up the 3 hoses, the map sensor looking thing, the lock ring and turned the key and little fuel dribbled out of the end of the hose. I figured it was just because the lines were dry and 3seconds wasnt enough to get alot of pressure going etc. So I turned the key on/off a couple more times and a little more would come out each time. Randy tells me there should be a ton of fuel pouring out when I turn the key on and its not. I tried using the "prime" slot in the underhood fuse panel by getting power off that power terminal right by it that you get to by taking the big plastic cover off. When I jumped it the pump didnt come on. So I went back pulled the pump out, disconnected the plug from the pump, tested the + side of the plug and it had no power with the key turned on(during the start up 3second cycle) so I checked on the factory harness side of where I spliced the new plug in, no power there. I checked to make sure my relay was still clicking and it was, checked the fuse, it was still good. At that point I got pissed and now here I am on the couch on the internet. Im losing my patience with this POS. I looked at how the wiring is routed and chasing wires up under the truck is not an inviting task What I dont understand is last night with the original(old style) plug I had power to it, no with the new plug spliced in I dont, I could understand that but I dont have power before the butt connectors where I spliced in the new plug, thats what baffles me. I dont know how all the sudden I dont have power at that point when nothing changed except dropping the damn pump in the tank.
    2007 CCSB Z71 VortecMax: Stock!

  4. #4
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    Quote Originally Posted by 1slow01z71 View Post
    Where? I dont have a PM or email.
    sorry having problems with my compooper I will try again

    04 Grand Prix GTP
    03 Z71 wanting a Turbo ,Stall, and Tune BAD
    THE SURGEON GENERAL SAYS NOTHING ABOUT SMOKIN A FORD

  5. #5
    Join Date
    Sep 2006
    Location
    Coon Rapids, MN
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    here r the pics


    hopes this helps

    04 Grand Prix GTP
    03 Z71 wanting a Turbo ,Stall, and Tune BAD
    THE SURGEON GENERAL SAYS NOTHING ABOUT SMOKIN A FORD

  6. #6
    Join Date
    Feb 2005
    Location
    Austin, Texas
    Posts
    2,053
    Copy paste from pt again

    Well I swapped a relay and a fuse and the pump works now but the damn fuel level sending unit isnt working, my gas gauge shows dead empty and by looking in the tank I have ~1/3 of a tank. I used the pump to drain ~8 gallons out and at that point it sounded like the pump was cavitating(sucking in air with the fuel) and I didnt want to chance burning it up so I stopped there. Im not sure why it is doing that. I couldnt hold the jumper wire and watch the fuel feed closely into the gas tank to see if the fuel was getting erated(sp?) or not that will be a job for sunday. Tomorrow night Im taking the night off and saturday night I get to help move a friend With any luck(which I have none) it "could" be running Sunday

    So new question: Why would the pump work but not the sender even though the two wires coming from each of the units goes to the same plug on the under side of the fuel bucket assembly?
    2007 CCSB Z71 VortecMax: Stock!

  7. #7
    Join Date
    Feb 2005
    Location
    Austin, Texas
    Posts
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    Thanks 02, Ill let you know if I end up needing it.
    2007 CCSB Z71 VortecMax: Stock!

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