fuel pump runs with key off


showoff

10+ Year Member

Joined
Nov 4, 2007
Messages
6
Points
3,001
Vehicle Year
1991
Transmission
Manual
any ideas? thanks
 
What year truck is it?

The simplest cause would be the fuel pump relay being stuck closed.
 
Last edited:
its a '91 with the 2.9, where would the relay be?
 
It's under the power distribution box, in the engine compartment. Should be the last relay, toward the rear of truck.
 

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