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    rhall12's Avatar
    rhall12 Posts: 3, Reputation: 1
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    #1

    Mar 12, 2014, 04:09 AM
    My 1994 Chevy truck won't start.
    It doesn't have any spark to the plug's I have replaced coil, also the electronic's in the distributor and it has 12 volt's to the coil also replaced the ECM even though there are no codes stored in memory. Also I replaced seńsors map, IDE and it also has fuel to the throttle body fuel injection but still no help any ideal's.
    TxGreaseMonkey's Avatar
    TxGreaseMonkey Posts: 16,761, Reputation: 5597
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    #2

    Mar 12, 2014, 05:06 AM
    Replacing the Ignition Control Module (ICM) will likely solve the problem. Be sure to apply silicone heat transfer compound to the bottom of the ICM's heat sink.
    rhall12's Avatar
    rhall12 Posts: 3, Reputation: 1
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    #3

    Mar 12, 2014, 08:00 AM
    I already replaced the ICM and the ECM but I believe the ECM is not firing to the distributor.
    TxGreaseMonkey's Avatar
    TxGreaseMonkey Posts: 16,761, Reputation: 5597
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    #4

    Mar 12, 2014, 08:37 AM
    I'd focus on the Crankshaft Position Sensor, then.
    rhall12's Avatar
    rhall12 Posts: 3, Reputation: 1
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    #5

    Mar 12, 2014, 10:13 AM
    It is a 1994 Chev it doesn't have crankshaft positioning sensor
    TxGreaseMonkey's Avatar
    TxGreaseMonkey Posts: 16,761, Reputation: 5597
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    #6

    Mar 12, 2014, 12:34 PM
    What model and engine?

    Since you don't have a Crankshaft Position Sensor, focus on its analog; i.e., the distributor pickup and magnets in the distributor shaft. The ECM will not send the trigger signal to the ICM, if there's a problem with the pickup and magnets.

    It goes without saying that you should test all under hood and under dash fuses with a test light or multi-meter. Additionally, be sure to clean the main ECM ground.
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