Bench testing fuel pump?

[jpilk99]

I’m 99% sure my current fuel pump is dead. I’m going to drop the tank and remove it and wondering how I can bench test it. Or more specifically, I plan to go to the junkyard and pull one off another 2nd Gen and need to test it there in the yard.

assuming if I ground it and then put 12V to the proper connector that it should ...start humming or something so that I know it works.

don’t want to get one, bring it home, install it in tank and connect to truck/wiring harness to see whether it works or not. Then I’d have to go back to junkyard and start all over again.

thank you.

jay

 

[pacofortacos]

That should work, but be careful. Sparks and fuel don't mix well

It won't be an accurate test but will at least tell you if it runs and sounds normal.

 

[jpilk99]

That should work, but be careful. Sparks and fuel don't mix well

It won't be an accurate test but will at least tell you if it runs and sounds normal.

Thanks Paco. Any idea of the pinouts on the fuel pump? I can’t find an image of one to know what’s ground and what’s power...

And I’ll be mindful of sparks .
Thank you!!

Jay

 

[pacofortacos]

Have you looked at your fuel pump connector? I would think that the pump should have 2 larger wires than the other wires but do not know off hand.

According to one wiring diagram, it should be a Black wire (ground) and a dark green with black tracer wire for the power.

 

[CupidStunt]

1) I just replaced mine in my 95 3.9l for $51. Is it worth savings over that for using an unknown filter.
2) How do you know the fuel filter is ok on a used model?
3) Even if it pumps fuel how reliable is the fuel injection pressure regulator?
Those are my thoughts on it