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No start, no spark

Discussion in 'Chevy Trucks' started by obrut, Nov 6, 2003.

  1. obrut

    obrut Senior Member
    from IL
    Messages: 149

    I have a 94 full size blazer k1500 with a 5.7 It used to run but now it wont. It was running fine, then i started it later and it was running bad. Then the next day it wont start at all. The fuel pump is working, i put new wires, plugs, cap and rotor and fuel filter. I tried the coil and module out of my 90 1/2ton with no luck. The white and pink wires going to and coming from the coil have power. But the coil is not putting out and spark. Any ideas?
     
  2. wyldman

    wyldman Member
    Messages: 3,265

    Check at the coil again for pulsing power while cranking.If you get a pulse,it's the coil,or something else in the secondary ignition system,like a bad coil wire,cap\rotor,etc.

    If you get no pulse,then it's most likely on the primary side,like the module,pickup coil,or EST.
     
  3. obrut

    obrut Senior Member
    from IL
    Messages: 149

    how do you check for pulsing power? I have brand new cap, rotor and wires on it, i even tried and different cap and rotor.
     
  4. wyldman

    wyldman Member
    Messages: 3,265

    Use a test light,you'll see it flicker,or flash.
     
  5. obrut

    obrut Senior Member
    from IL
    Messages: 149

    anyone know were i can get a distributor for a 94 blazer with a 5.7 in IL?
     
    Last edited: Nov 9, 2003
  6. mrzulu

    mrzulu Junior Member
    from florida
    Messages: 18

    put it on a diagnostics unit... sounds like throttle body is not getting signal from fuel module consequentley the engine computer... i just had the same prob with a 96 lumina... fuel module and EST were both fried... engine runs... great spark and smooth run, but injectors had no pulse thus no fuel injected... just a thought... again i could be wrong
     
  7. obrut

    obrut Senior Member
    from IL
    Messages: 149

    i got it, it was the distributor one of the pickups broke off. Now i just need to adjust the timing but i can't find the wire the i'm supposed to disconnect to set it.