The possible causes are:
Ignition module.
PIP sensor (the pickup coil inside the distributor).
Ignition coil.
You can test the resistance of the primary coil winding - it should be 0.3 to 1.0 ohms. Secondary winding resistance should be 8k to 11.5 k ohms. If this checks OK, connect a 12-volt test light between the TACH connector and engine ground. While cranking, the light should pulse on and off. If it fails this test, replace the ignition module or PIP sensor. You can only tell which one has failed by substitution with the normally available home testing equipment.
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Thursday, March 16th, 2017 AT 12:44 PM