LUVTruck.com

hey guys n gals, its been a while since my last visit on here but i need a question answered as quick as possible as i need to do it in the next few days.

how do you properly wire up an electric fuel pump and what do i need to do it as i am getting rid of my mechanical one.

thanks heeps in advance
regards, noyz

_________________
I said no to drugs....But they just wouldn't listen!

No matter how good she looks, some other guy is sick and tired of putting up with her crap!

To properly wire it it it needs to only work when the starter is cranking or the alternator is charging.

That way if the key is on and the engine is stopped/stalled the motor is not getting fuel.


I wired the one on my ute in with a saftey cut out box from a LPG (Propane) system. It works off coil pulse.


Bob.

_________________
Current project, 1979 KB Isuzu Ute.

Daily driver, '86 Rodeo Spacecab.
Chasing parts for Isuzu Impulse.

its actually for my vh commodore, it runs on gas as well as petrol, so when the petrol shuts off the mechanical pump still runs and it leaks fuel.

_________________
I said no to drugs....But they just wouldn't listen!

No matter how good she looks, some other guy is sick and tired of putting up with her crap!

The mechanical pump shouldnt leak. The stop solenoid or the fuel pump need replacing then.


If your going to put on an electric pump you could power the pump from the coil pulse box. But you will need to sort it out so the fuel/off/gas switch will still give power to the pump when on petrol and the gas solenoid gets power when it needs to be open.


Bob.

_________________
Current project, 1979 KB Isuzu Ute.

Daily driver, '86 Rodeo Spacecab.
Chasing parts for Isuzu Impulse.

i want it to run when i switch it to petrol but cut out if it dies, is there a way of putting a relay in or something?
also, which wire is the one you used to get the coil pulse?

_________________
I said no to drugs....But they just wouldn't listen!

No matter how good she looks, some other guy is sick and tired of putting up with her crap!

Depends on what coil pulse box youve got on your car how its wired.

Pertty sure it works off the neg side of the coil.

Im not sure if the pulse box can do both functions. If i rememebr right the cut solenoids are apply + to hold open.
Even with the electric pump you will still need the fuel cut solenoid.
Im pretty sure you wont have a fuel return line either, most electric pump setups ive seen need one. Other wise the pump is too 'loaded'


My old HQ had the fuel cut solenoid in the steel pipe between the fuel pump and the carby. That way when the motor was on LPG the mechanical fuel pump was on constant internal bypass. Switch back to petrol and it was pretty much instantly there.

I still rekon youd be a lot better off fixing up the mechanical system. It might not be any cheaper but it will be easier.


Bob.

_________________
Current project, 1979 KB Isuzu Ute.

Daily driver, '86 Rodeo Spacecab.
Chasing parts for Isuzu Impulse.

ill have to look at my fuel system a bit closer then and sus out whet is my better option. thanks heeps for your help.

regards, mark

_________________
I said no to drugs....But they just wouldn't listen!

No matter how good she looks, some other guy is sick and tired of putting up with her crap!

Thought electric fuel pumps had to be hot all the time when the engine is running to work and pump gas.

_________________
Too much to do and not enough time or money!
Courage is the other side of fear!
Pain is the weakness leaving the body!

im not to sure if its just an aussie thing, but cars here run on petrol and liquid petroleum gas (lpg) the car i am talking about runs on both

_________________
I said no to drugs....But they just wouldn't listen!

No matter how good she looks, some other guy is sick and tired of putting up with her crap!

Probaly best if you call it propane instead of LPG or Gas.



An electric fuel pump doesnt need to be hot. Well not an inline external pump.


Bob.

_________________
Current project, 1979 KB Isuzu Ute.

Daily driver, '86 Rodeo Spacecab.
Chasing parts for Isuzu Impulse.