i have a 1986 s-10 blazer 4x4 2.8L tbi my fuel pump runs all the time even with the key off. i have pulled all three realys on the fender well and the pump still runs anybody have any segestions ?

 

smack it with a hammer! seriously though maybe try tappin on the tank. i wonder if it sends a ground to start it and maybe the wire is cut and resting on the frame or something. have had a similar problem in the past with a inline fuel pump

 

The wiring to the pump must be shorted to power somewhere. The fuel pump relay provides +12V to the pump. If this shorts to power, the pump will run continuously provided that it has shorted to a continuous power source.

 

hey thanks for the info. think that maybe the wires under the carpet on driverside carpet read some of the other post one said they run there will let u know

 

hey guys thanks, got it fixed. it was in the wiring loom under dash ran a new wire works fine now thanks again.