Question about 1996 GMC Sierra

3 Answers

1996 gmc siera 4.3L

It seems that it is getting gas. Ive replaced the fuel filter a short time ago and the fuel pump a year ago. When i turn the ignition i can hear the fuel pump running (electric fuel pump in gas tank). But if i pour a little gas in the carb it will start but won't stay running.

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  • clharris007 Mar 08, 2009

    I pour gas in the throttle body and it will start right off and run great for a minute. Then die slowly. I can hear the gas pump running when I turn the key on. Filled up at a gas station and drove over 100 miles one way, no problems. On the way home it would only go little by little, then all of a sudden it started running okay. Got home, then the problems started with it not wanting to stay running.

  • clharris007 Mar 09, 2009

    Can't get it to stay running, can you sugget a fuel gauge to purchase?

  • clharris007 Mar 09, 2009

    When I replaced the fuel pump motor it would run but bog down if you gave to much gas fast, would this have anything to do with it.

  • clharris007 Mar 09, 2009

    The repair manuel says 60 to 65 lbs of fuel pressure. Would anything
    less be reason for it bogging down and could replacing just the pump
    motor improperly be a cause

  • yadayada
    yadayada May 11, 2010

    then it has no fuel pressure

  • Mike Butler
    Mike Butler May 11, 2010

    Just idling problems? Does it run o.k. down the highway?

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  • GMC Master
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U need to check the fuel pressure, did u replace the fuel filter? if not do so sounds like it may be plugged, plus if it is it will destroy the new pump.

Posted on Mar 09, 2009

  • yadayada
    yadayada Mar 09, 2009

    are u sure u hooke the motor up correctly this was just a pump not a pre-wired pump assembly? what fuel pressure do u have? also u did change the filter correct

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  • GMC Master
  • 6,674 Answers

I agree with emissionwiz, pump may be making noise but I suspect little or no pressure getting produced. Would take a shop 10 min. to attach fuel pressure gauge & confirm.

Posted on Mar 08, 2009

  • Mike Butler
    Mike Butler Mar 09, 2009

    Autozone has one with GM. with TBI connector for $40.

  • Mike Butler
    Mike Butler Mar 09, 2009

    Does it seem like it runs better & longer with full tank, or on a cold day?

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  • Master
  • 1,066 Answers

Is fuel getting into the carb?  If it is, is the float chamber full?  Is the float stuck?

Posted on Mar 07, 2009

  • landsend
    landsend Mar 09, 2009

    At least you know that the problem is fuel delivery.

  • landsend
    landsend Mar 09, 2009

    At least you know that the problem is fuel delivery.

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