KATHY 11/28/2010

1988 GMC C3500 Sierra 8Cyl5.7L - Engine

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how come the throttlebody doesnt take gas. when i turn on the key no gas i have a outside pump i have gas coming to it

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  techforce1969 11/29/2010

  check ecm fuses ,fuel injection fuses if those are good have your ignition module in distributor tested at parts store ,autozone

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  david 11/29/2010

  are you saying you put a nother fuel pump out side the tank you have got to have so much fuel pressure to run truck

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