Truck will not start

1997 GMC TRUCK
128,000 MILES • 5.7L • V8 • 4WD • AUTOMATIC
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FLINT D TIETJEN
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At first my truck would start for just a second and then shut off. I thought it must be my fuel pump so I changed it out. Still doing the same thing. I have a code reader and there is no codes showing up. I disconnected my ecm and reconnected it and my truck started ran but not very good. When I shut it off it will not start again. Unless I disconnect the ecm again. I put in a new ECM but still the same problem. Is there any one that can help me? Thanks
Feb 17, 2017 at 1:32 PM
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HMAC300
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check all fuses under hood, then pull distributor cap off and see if you can move rotor if you can distributor is shot. but in this case because of what you are doing you need to have a mechanic see what is going on.
Feb 18, 2017 at 6:18 AM