TwinTurbo.NET: Nissan 300ZX forum - Could use a test light LED to monitor the injector signal
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Subject Could use a test light LED to monitor the injector signal
     
Posted by jzack on December 10, 2018 at 9:35 AM
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In Reply To 1992 300zx TT posted by ZTom on December 09, 2018 at 09:50 PM
     
Message from the ECU and see if it blinks while car is idling. That would be a good way to verify if the ECU was signaling the injector to fire. Just be sure a low current LED tester is used.

If LED remains on all the time, probably a bad ECU. If it blinks, injector is probably stuck open.

BTW - Why do you believe the issue is with #4 cylinder?

     
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