Quote:
Originally Posted by Richard2112
crankshaft position sensor
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The 1993 4.3 used a TBI injection system which does not have a crank sensor. The distributor is used as the rotation sensor and gives a reference pulse to the computer which tells it to fuel and fire.
Check the distributor module per some other posts on here. I should also note that not all modules are created equal and the new one may not be good. Check it to make sure. Also check for voltage along the way.
You didn't mention if the injectors were firing. are they?