fuel pump won't shut off

[kneeshurt]

turn key on fuel pump won't shut off after a few sec. i changed the relay it did not help what else could i check. 87 gn stock

 

[RmvBfrFlght]

Sounds like the oil pressure switch went bad. When working correctly it is a bypass for the relay. Once oil pressure builds a little it will close to provide power to the FP in the case of a bad relay or ECM.

When they go bad they can power the FP without oil pressure being present.

RemoveBeforeFlight