Hi all, just a quick question. I have a qd32 car... the problem is when i prime the primer pump i see heavy fuel coming out of the return line when the car is off... what could cause this.. also every morning i have to prime the car before it starts
Injector pump
- Thread starter Lingtyson
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click search forums put in :air leaks fuel lines : and you will find your answer
thats not an issue. with many VE style pump engines you will push fuel back to the tank when pumping the primer.
not sure if i have the manual for that one, one thing to check is some VE pumps run a valve on the fuel return and that can go weak and not hold proper pressure inside the pump, which effects timing.
Thanks for your respond... just a quick question where can the valve be found?
if its got one its usually under the fuel return banjo on the pump.
did you unbolt it off the pump and check under it ?
afaik thats the case.
if there s no spring and valve in there then its doesn't have the valve and fuel flowing back to tank when you use the primer is normal.
my toyo is the same.
my toyo is the same.
if it has a strainer in it, then you have taken off the inlet pipe not the outlet. the outlet is what may have the valve in it.
with no valve it won't hold pressure, its not meant to hold pressure.
one small thought, after you go for a decent drive, stop and quickly open the fuel cap. if you hear a woosh you may have tank vacuum. that can happen if the tank breather is blocked. that an cause fuel to be sucked back into the tank when you stop.
if your priming the filter to get the car started in the morning the fuel has drained back to the tank. thats generally caused by the one way valve in the primer not working and often an air leak (poor filter seal or split hose end). a boat fuel primer or one way valve fitting down by the tank will help stop fuel draining back to the tank.
thats not an issue. when you prime you pump fuel to the injector pump and back to the tank.
his primer is probably not working which is not uncommon.
