fuelpump/ecu power issues

Right update:

Its all hooked up in the right places, feed and return etc. Fuel rail and fuel tank ends.

I pulled out the pump and gave that a test, cowboy style using a jerry can and a coke bottle and just pumped a little bit of fuel from one side to another.

While we were testing it, the car sounded like it wanted to fire up even though the fuel pump wasnt hooked up?

Also when it was running the fuel pump was pumping quite alot and on the test I just did it wasnt pumping alot; could this be because we didnt have alot of fuel to play with or do you recon theres a bit of sh!t in the pump becuase I ran it without a fuel filter?

The fuel pump note will be different when the pump is under pressure, so thats why it sounds different when on the car.

If the pump is working, and it is pumping from the tank ok, but theres no fuel pressure at the rail, you may have a faulty FPR, or there may be a blockage in the filter/ fuel lines. Its also possible the pump is knackered and isnt pumping the fuel up to pressure.

You need to strip the fuel system from the rail back and test at each stage at a time.

Right sounds good.

We retested it with more fuel and it was working really well and as you said the pump note changed.

We noticed a bad solder on the positive side of the fuel pump, so a quick re-solder and refit and hopefully thats the culprit. If not it looks like well have to strip back the fuel system :(

Thanks again for your help and your patients.

http://s25.photobucket.com/albums/c5...t=MOV00331.flv

and theres the result :(

Im starting to think the FPR may be fubarred. Remove the fuel feed on the back of the rail and crank it, see if your getting plenty of fuel. If you are, the FPR's not holding presssure OR the pump is struggling under pressure.

EDIT double check your fuel lines arn't crossed under the car, and you 'think' youve plumbed the feed in where its actually the return. If youre trying to pump the wrong way through the FPR it would give the same symptoms you mention, run for a bit then cut out, and you may have fubarred the FPR in the process :(

Done that, there was a fair amount of fuel coming out. I dont think the problem lies with the fuel pump. How can I test the FPR?

http://i25.photobucket.com/albums/c5...h/DSC00334.jpg

http://i25.photobucket.com/albums/c5...h/DSC00333.jpg

Also, whats the score with these vaccum pipes?

Quote:

---

Originally Posted by djshaggeh

Done that, there was a fair amount of fuel coming out. I dont think the problem lies with the fuel pump. How can I test the FPR?

---

Well if there is definately plenty of fuel getting to the rail, then either the FPR isnt holding pressure or the pump cant cope when the system pressurises. Only way to eliminate these is to try different items im afraid, or fit an inline fuel pressure guage.

Quote:

---

Originally Posted by meritlover

i was being sarcastic :roll:
if there was no power,then theres no power, that IS the problem....trace it back and find out why not

nice of you to contribute another 'useful' post however.

---

Sometimes contributing on a contribution seems more fitting than contributing on the initial problem. Chin up - just a subtle joke.:cool:

sounds to me that the engine aint firing when we crank it.
with the fuel pump disconnected and not even any fuel in the equation it tries to fire, and almost does, but with the pump and fuel system hooked up, sounds to me that its not even gettin a spark cos the engines not even trying to start, has the ECU some control over the spark if it senses the fuel systems outta sync ?

could we test the FPR the same way as we tested the feed pipe ? im not 100% sure how its internals work, but if it does what i think it should, wouldnt we see plenty of fuel coming out the return if it was knakered ?

also those vaccum pipes seem suspect to me, like they should be joined together with a thin plastic pipe or blocked off ? that would effect running aswel no ?