Does it quit at random or is it something like, It quits when I hit a bump while turning right?
Do you still have the original distributor? And do you have a multimeter? (Or even better a scope)
From the description I am going to say you have either a wiring issue or the ECU is failing. Not likely that three different distributors all are failed the same way.
First we will test the wiring and the sensor. Disconnect the negative battery lead.
The two signal wires for the CPS are yellow (shielded wire) and black. They both run from the distributor to the ECU (connector pins C29 and C30) Use the multimeter set to ohms. Disconnect the distributor connector, check the ohms reading on those two wires. It should fall between 500 and 1000 ohms. Outside of that you have a problem in the sensor. Also check for continuity between both wires and the distributor housing. Should not be any.
Next plug the distributor back in and unplug connector C ( 31 pin connector) Now locate the two wires in that connector. They will be next to each other in the same row. Connect the meter there. You should see almost the same ohms reading there as you did at the other end. No reading or much higher and you need to trace the wires back to find damage or bad wiring. If the reading is the same (or very close) it is likely the ECU itself that is bad.
No real way to test it without a good scan tool to actually see the signal.
Tuesday, January 3rd, 2017 AT 7:13 PM