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Injector problem - ECU pins 9 and 18? 900 1992

posted by  ken944 on  Fri Jul 24 08:18 CST 2009
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last visit: Tue Sep 17 11:06 CST 2013
[RELATED]

When checking the connector pin #1, engine cranking, the voltage fluctuated between 5-6 volts. Bentley's (again 240) states 8 volts minimum. But at that point the battery was declining. I did choose to replace the crankshaft sensor partially as a result of this reading but as the pumps were running on this and prior cranking I assumed it was getting the voltage the ECU needed.

But Art's point about the ICU connection bears a re-check of the voltage at pin 1. I assume it should read battery voltage?

I disconnected the intake line at the fuel rail and both observed and ran the line into a container, I'd say it's getting very good pressure, no real doubt. I used a separate single injector harness to test operation of the injectors themselves and at least the first two operated on residual pressure in the rail when manually grounded. But again worth checking by gauge.

Ken






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