Power source for fuel pump??

[Baloo914]

Pulled the whole engine, top end rebuild.. head work, new P&C, etc... reinstalled the whole thing, and the fuel pump doesn't have any electricity to it. I have carbs and I can't seem to find where the source of the fuel pump's power. Any pointers??

[tmk]

The FI brain controls the power for the pump. Find a wire that is hot when you turn on the key. Or run a wire from the battery to a switch on the dash then to the pump and use a inline fuse.

TMK
73 2.1L

[PeteD]

There is a simple and somewhat more elegant (if I dare say so) solution.

If you study the relay board, you will note that there is a relay there for the fuel pump. (It is the second one from the back of the car, see page 128 of the Haynes manual). To the right, in front of that relay is the "power" relay. The power relay turns on when the key is turned.

With a carbed car, you do not really need either relay. But, if you put in the power relay and put in a jumper wire from the pin at 3 o'clock (pin 85) to the pin at 7 o'clock (pin 87)on the fuel pump relay, (12 o'clock being the front of the car), you can use the stock fuel pump wire to power your fuel pump and you won't be putting an added load on any other circuits. The pump will turn on when the ignition key is on and off when the key is off. (use a large wire that fills the socket holes and a piece of tape to hold it down for extra security).

PS. you are using a low pressure pump and a pressure regulator now, right?

[This message has been edited by PeteD (edited 03-09-2000).]

[Baloo914]

Yes... low pressure pump with the crappy 32/36 Weber progressive setup... (anybody got a 40 or 44mm setup they want to get rid of??)

[scriabin]

I have carbs and still use the original power and ground leads, which come from the main wire loom which runs the firewall. And I do recall having to invent a jumper on my relay board to make it work.

Only I can't remember as precisely as stated above, noting exact poles, but it did seem to involve old, unused FI pathways. And providing a new ground for the circuit.