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Son of intermittent no start - Part II 200 1993

posted by  AOG on  Thu Jul 11 04:28 CST 2013
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last visit: Sun Feb 2 13:09 CST 2014
[RELATED]

Remove the back cover of the ECU connector at the ECU so you can access the pins. When you get the no-start condition, check the resistance from pin 13 to ground (coolant temp sensor). You should get somewhere in the neighborhood of 1500 Ohms resistance. An open circuit at the coolant temp sensor will give you a no-start for sure. Also, the main/fuel press relay can be functional but weak/dirty contactors can be as bad as an open circuit. Make yourself up a "Y" jumper with 3 male spade connectors, remove the relay entirely, and jumper across the contactor terminals at the relay connector (I forget which ones, but the relay should have a diagram on it to help you figure it out).

Steve






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