fuel pump wiring

problem:
fuel pump or injectors(have receipts previous owner for new injectors 6 years ago, cars sat on and off for 10) are draining pressure and causing hard start till the oil pressure rises then starting the fuel pump.

my check/solution:
if its the fuel pump since it works great once on and we cannot find a leak would be to set up a signal on the ignition to fuel pump so the fuel line will pressurize rather then waiting for the normal signal when the oil pressure rises.

in theory it shall work even if I have to wire up a push button it will eliminate 2sec of the hard starts unfortunately i have no idea where to start! so am I correct in my thoughts? and how might i attack this without the huge costs of overhauling a fuel system on a dying engine?

Yeah, your fuel pump doesn't care about your oil pressure, it should prime itself as soon as the key is moved the 'on' position.

If you turn the key to 'on' without starting the engine a few times, and then try starting, does it fire up quicker?

yes in the morning when pressure has left the lines I have to turn the engine over till there is oil pressure then she starts up like a dream for the rest of the day, and no the key doesn't fire the fuel pump at all it seems relient on oil pressure.

alright relay it is... I so have no idea where too look, first fuel injection ive worked on.. is it just in the relay panel? phone in the morning see whats available...

the way it was explained i was in belief that the sensor only kicked after the oil pressure....sounded funny to me

how would i find where the pressure is leaking? just replace the injectors then work back to the pump? i've heard injectors difficult too "test"?

side note I dont think im equiped for injectors..

Dave is right, I just went through this myself.  The oil sender has a switch in that will run the fuel pump if the relay malfunctions.  But I bet you need to crank it a bit before much pressure reaches the sender.

The relay should be behind the air cleaner on the firewall.

I'm not sure you have any more leaking than normal.  Try replacing the relay and go from there.


The Dawg