Question Fuel pump

[karindryan]

Yes Chevy 454. Ok —so test fuel line into throttle bottle first to see if fuel is coming in while turning over? Then check pump relay and fuses? And then tap hard ten times under middle of fuel tank (which is half full) while someone else tries to start? Correct order?

 

[karindryan]

Yes Chevy 454. Ok —so test fuel line into throttle bottle first to see if fuel is coming in while turning over? Then check pump relay and fuses? And then tap hard ten times under middle of fuel tank (which is half full) while someone else tries to start? Correct order?

 

[karindryan]

Throttle body not bottle!! Altho that’s kind of funny

 

[Kevin D Pem]

Ohm out = check fuse with volt/Ohm meter. (No vm just replace fuse with new on for testing).

ECM =engine control module.

If you think you see copper tape wire.

On some vehicles an access hole can be made in the floor, however dropping the tank is preferable.


As stated above by gypsyR find the relays and check them. Unlike a car they could be anywhere, not in a dedicated box.

Fuel pressure may also be a problem two of the pumps I have replaced the pressure regulator was in the pump, others are in the engine compartment.

 

[karindryan]

Ok thanks very much! Very helpful.

 

[karindryan]

EFI???

Hi! Do you know where I can find the fuel pump relay and fuse?

 

[Kevin D Pem]

In my 94 bago it was on the steering columb. The fuse with be wherever they put the chassis fuse box