TwinTurbo.NET: Nissan 300ZX forum - I think it’s probably more of a bad wiring issue than of the
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Subject I think it’s probably more of a bad wiring issue than of the
     
Posted by jzack on August 10, 2018 at 10:50 AM
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In Reply To Fuel pump stays on without key..or fpcu posted by pandamanz32 on August 09, 2018 at 11:24 PM
     
Message ECU being bad. Former owner probably couldn’t figure it out so they rigged up a bypass to accommodate.

Best thing might be to run a wire continuity test from the ECU socket to pump controller and do the same for controller to relay (cut wire). Can always run a new line if needed to get things back to normal.

If you have some electronics knowledge - not hard to check ECU connector to verify FPC signal is actually there. That should rule out for sure no ECU issues...

     
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