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Re: 93 4.3 chevy truck no spark.
Did you make sure you have power to the Ignition coil when the key is in the on position?
Test the pickup coil in the distributor.
Pickup coil testing:
500 to 1500 ohms between terminals.
Infinite from one terminal to ground.
When testing the pick-up coil resistance, the key should be off, and the pickup coil should be unplugged from the distributor module.
Another possibility is the magnetic material on the reluctor on the distributor shaft that spins in the pick-up coil has cracked making a less powerful magnetic field for the pick-up coil to make a good pulse signal.
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For those of you that are wondering why you are not getting replies to your thread:
Did you give the model, year, engine, fuel system type, and transmission information?
If it is modified from what came stock from the factory, let us know that too.
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