Car Starts Then Stalls

[Flash89]

when i start the car, it fires and starts, but as soon as it starts just stalls

could it be fuel pump, it seems to be fine as i took the hose off and put it in a bottle and seemed to be flowing fuel pretty fast

i was thinking it could be fuel reg, so i blocked the return line and try to start, same thing

now i am wondering if it could be the fuel relay, could it be possible?

should i try give the fuel pump straight 12v from battery then try start?

AFM, car will start if i unplug it right?

Edited August 8, 2009 by Flash89

[Flash89]

any ideas????

[Flash89]

could too much fuel cause it to die straight after starting???

[FLN75S]

Car will run with AFM unplugged try doing that and see how it goes if you notice a difference straight away try cleaning your AFM.

Mates 34 started running rough then would not idle once started untill i unplugged the AFM, we cleaned it and now its perfect again so i would give that a go its an easy thing to do.

[Flash89]

no difference. i forgot to metion that the car wasnt running a fuel filter when i got it, i have installed a fuel filter now, could the injectors be blocked??

[mad082]

they could well be blocked, but you would think that it wouldn't start if they were. have you pulled the spark plugs out to see what they are like?

the amount of fuel flowing by the pump shouldn't be an issue. even if it is flowing lots, it isn't like a car with a carby where it will flood it. the fuel pump has a line to the engine and then there is a line that returns to the tank as well. the fuel pump constantly pumps fuel and the amount going into the engine is determined by the injectors.

and while the car may run with the AFM unplugged, it will usually run like crap, and if you have weak/fouled plugs it won't run.

what happens if you start the car with a little bit of throttle?

[Flash89]

spark plugs are new, i have tried throttle still the same. when i have the time i will try the pump out of my 32 and if still doesnt work i will be pretty sure it will be injectors.

thing is i took the cas out and spun the shaft to check if injectors where working. i spun it quite a bit so there would of been a fair bit of fuel in there. after that tried to start it again and it started for a bit longer like another 2 sec or so.

how many cylinders that fire that can actually keep the car going, i am thinking that some of the injectors are bit blocked as not spraying enogugh fuel. (if someone could educate me on that)

[mad082]

the car will start on less than 6 cylinders. it will run on about 4 (not sure about starting though). if you are concerned about the injectors then i would get them professionally cleaned. it should cost around $200 to get all 6 done and it gives a much better result than injector cleaner you put in the tank.

i wouldn't bother about the fuel pump. it is pumping fuel so it is fine. fuel pumps generally pump just as hard at idle as they do at high rpm (although some cars don't). so as long as it is pumping fuel then it is fine.

[Flash89]

well i got the car started in limp mode, after changing the injectors. when the afm was connected it was doing the same thing, so i changed it to my old afm which was working on my old rb20 and still that same, is there a way to figure out a fault in the wiring to the afm??