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ECU is a suspect? 200 1989

posted by  someone claiming to be macs70GLT on  Wed May 30 23:07 CST 2018 [RELATED]

Art,

I took measurements correctly tonight, backprobing ecu pin 13. I also measured the thermostat housing temp again for reference.

Initial start of the car
thermostat housing 22.4 deg C; pin 13 measured 2.2 volts dropping quickly

after running 4 minutes
thermostat housing 36.6 deg C; pin 13 measured 1.34 volts

Based on the first graph you posted these numbers look good.

I did order a 951 ecu; think I will also get an intake manifold gasket.

Could a bad cold start injector cause idle issues past the cold start phase?

Thanks

Mike






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