On my 1987 4.9 EFI model, the fuel tank selection is stuck on the front tank. When the switch on the dash is flipped, the fuel gauge accurately displays the level in the back tank, but the pickup still drains the front tank (learned this the hard way).

Any ideas on what may be happening?

Thanks!

 

Does the rear fuel pump come on?

 

How can I tell if it does?

 

Listen for it.

 

or the fuel pump ready light on the dash...

 

Wtf are you talking about?

 

It was a joke Sean

 

When I see the wrong gen truck in an avatar it goes right over my head.

 

I have owned 4 F-150's now ... 87/92/94/08.

 

So you're 3/4s cool.