[tag team]

does anybody know why my 87 is not cuting my pump on in the tank.
the pump is new. and i have juce going to all of the componits in the back
also i can run a hot wire from the battery to make it run but it floods the car very baddly its not like it is not returning back to the tank.

i have check and check i dont have a clue !!!!!!!!!!!

[83 5.0]

Was there power before you put in the pump or were you changing the pump because you thought it was dead?

Sounds like your ground is okay but the +12v wire is open or the relay, or inertia switch is causing your problem. How are you measuring the juice, using chassis ground or through the ground wire going to the pump?

I would start at the relay under the seat, should momentarily click on when key first turns on and run the pump for a second or 2.
The pump will only fully work once the engine is running. You can try a jumper wire to bypass each item individually to see if pump comes on.

As for the flooding" Where is it flooding at, you may have pinched the return line to the tank.


I maybe repeating what you have already checked, but hope it helps.

Good Luck

[tag team]

hey is the relay switch under the damn driver seat i have looked every were for that damn thing

[83 5.0]

Yes it should be, it was on my 86 GT, don't believe that ever changed, as there was a post just before this that had a similar problem, it was disconnected.

[tag team]

ill give it a try. but i am still lost on why it is dumping fuel in it so much fuel going in it it is blowing it out of the pipes and puddling up on the ground!

[83 5.0]

Is your fuel connector fully seated, might need new O-rings.

[tag team]

its not leaking its dumping it thru the motor wile its running

[95opal]

presssure regulator gone bad? kink in the return line

[tag team]

hey were is that pressure regalater at?

[83 5.0]

I've seen some of the Ford in tank pumps become disconnected inside the tank with the rubber hose connection on the plastic pump(s), check this maybe it blew off with back pressure.

Regulator I believe is the round canister part on your fuel rail on the manifold with the injectors. It also allows unused fuel to bypass and return to the tank.

[New88MustangOwner]

it sounds like you pinched the return line when you put the tank back up in. I did the same thing. my fuel pressure gauge was pegged, & when i would turn the key on the pump was very loud. you might want to check it

[spicetraders]

For your non-running pump (i know it sounds silly but) did you push the fuel shutoff reset button located behind the driver side tail light in the trunk?