afp
08-21-2003, 20:52
I ordered the Mega Kit and a lift pump/fittings form JK today.
It seems to me the ideal wiring would be from an oil pressure switch. If the pump is wired directly off the ignition, then if the truck gets in a wreck and fuel line is cut, the lift pump will be pumping fuel all over the place.
The downside is wiring to an oil pressure switch means the lift pump doesn't start operating until there is oil pressure, which may cause a slow start if there is air in the line. This could be overcome by installing the Mega pre-OEM, or wiring an additional line to the lift pump relay that also provides curent on start-up. You have to be careful here, as if you wire incorrectly, you can wind up providing juice to the starter motor via the oil pressue switch which will keep the starter running after the engine starts. That happened to me once on another vehicle.
Alos, how is the lift pump at sucking fuel? It would be convienet to mount the thingunder the hood instead of by the fuel tank.
Blaine
It seems to me the ideal wiring would be from an oil pressure switch. If the pump is wired directly off the ignition, then if the truck gets in a wreck and fuel line is cut, the lift pump will be pumping fuel all over the place.
The downside is wiring to an oil pressure switch means the lift pump doesn't start operating until there is oil pressure, which may cause a slow start if there is air in the line. This could be overcome by installing the Mega pre-OEM, or wiring an additional line to the lift pump relay that also provides curent on start-up. You have to be careful here, as if you wire incorrectly, you can wind up providing juice to the starter motor via the oil pressue switch which will keep the starter running after the engine starts. That happened to me once on another vehicle.
Alos, how is the lift pump at sucking fuel? It would be convienet to mount the thingunder the hood instead of by the fuel tank.
Blaine