No Fuel !!

[trickjohn]

Im struggling to get fuel to the engine? I undone the fuel pipes leading to the injectors and there is nothing coming out.

There is power to the pump.
I have changed the relay.
I have put another pump on it.

There is no wurring coming from the pump when the ignition is turned on, just one initial pulsing feeling, even with a direct current, which makes me think its the pump, however I got a 2 ltr Sierra one from a scrappy and it does exactly the same thing - so Im either very unlucky and brought another broken one or the fault is elsewhere.

So it could be the immobiliser or the ECU - does anyone know how to check them?

Any help would be apprecated as this is driving me mad.

Thanks in advance Sean

[GreenV8S]

Have you got a voltage across the pump?
Is the pump actually running?

(I mean a voltage difference between +ve and -ve terminals, not just measuring 12v on the +ve side relative to vehicle earth.)

Edited by GreenV8S on Monday 25th August 15:58

[trickjohn]

Hi all,

I have changed the diode in the inertia switch, injector relay, fuel pump relay, checked all the fuses, there is fuel to the pump. The pump gets power when the ignition is turned on and when the engine is being turned over there is power.

I am abolutely convinced that it is the pump, as a direct feed pos and neg from the battery to the pump with the fuel injector pipes undone does not produce petrol.Talking to people with experience of the same pumps tell me that they will pump all day long if a direct feed is used. So it looks like the 2nd pump I brought was jammed. Another pump goes on tomorrow, if that doesnt work then Ill buy the £4995 V8S.

Any other thoughts?

Regards Sean

[Barkychoc]

trickjohn said:

Hi all,if that doesnt work then Ill buy the £4995 V8S.

I hope it doesn't work

[clarenceboddiger]

trickjohn said:

Any other thoughts?

I havent had to touch my fuel system so this may not be valid,it depends on what typre of pipe feeds the pump but I have seen instances whereby the pipe feeding the pump,ie under suction, collapses internally when petrol is sucked through it ( also happens on brake pipes)this causes the pipe to effectively close.Worth a check.

[trickjohn]

Cheers will have a look tomorrow then the new pump is on.

[GreenV8S]

trickjohn said:

a direct feed pos and neg from the battery to the pump with the fuel injector pipes undone does not produce petrol.

Does it produce noises from the pump to indicate that it is making any attempt to pump?

(Lack of flow elsewhere could just indicate that there's a blockage.)

[trickjohn]

There is a pulsing from the pump, but no wurring. When the pump was removed, there was a free flow of petrol to the pump. The return tube is clear as I can blow down it, with the pump coming off again I will blow down the other tube to make sure it is clear.

[Barkychoc]

Maybe a stupid suggestion but you haven't introduced a kink in the pipe somewhere have you with the work on the engine or something else?
So even when the pump is trying to pump it can't as it's outlet is blocked further up the line.
Can you blow down the pipe from the outlet of the pump with one of the injector feeds disconnected?

Taste that petrol mmmmmm.

[trickjohn]

All is clear there are no kinks, I can blow down both pipes from the injector end with them disconnected, one to the tank, the other undone from the pump. There is no resistance from the tank to the pump, a free flow of petrol - no collapsing of the inlet pipe to the pump. The new pump comes tomorrow.

Sean

[GreenV8S]

trickjohn said:

All is clear there are no kinks, I can blow down both pipes from the injector end with them disconnected, one to the tank, the other undone from the pump. There is no resistance from the tank to the pump, a free flow of petrol - no collapsing of the inlet pipe to the pump. The new pump comes tomorrow.

Sean

For the acid test you would connect a hose from the pump outlet to a suitable catch tank and turn the pump on for a moment. If the pump is pumping you will soon know about it.

[pringli]

GreenV8S said:

trickjohn said:

All is clear there are no kinks, I can blow down both pipes from the injector end with them disconnected, one to the tank, the other undone from the pump. There is no resistance from the tank to the pump, a free flow of petrol - no collapsing of the inlet pipe to the pump. The new pump comes tomorrow.

Sean

For the acid test you would connect a hose from the pump outlet to a suitable catch tank and turn the pump on for a moment. If the pump is pumping you will soon know about it.

Or with both inlet and outlet disconnected does the pump run continuously?

[GreenV8S]

pringli said:

GreenV8S said:

trickjohn said:

All is clear there are no kinks, I can blow down both pipes from the injector end with them disconnected, one to the tank, the other undone from the pump. There is no resistance from the tank to the pump, a free flow of petrol - no collapsing of the inlet pipe to the pump. The new pump comes tomorrow.

Sean

For the acid test you would connect a hose from the pump outlet to a suitable catch tank and turn the pump on for a moment. If the pump is pumping you will soon know about it.

Or with both inlet and outlet disconnected does the pump run continuously?

You really don't want to run the pump dry. A brief test to see if it make s anoise probably wouldn't do any harm, but the pump relies on fuel for lubrication and cooling and wouldn't like running dry. The purpose of running it with the outlet disconnected would be to prove that it is actually pumping. Obviously with fuel being pumped out under pressure you need to have somewhere suitable to receive it or things could get dangerous.

[pringli]

Pete,
yep I assumed he would only run for short period when dry, just if he leaves inlet connected it pumps at a hell of a rate and he may not be prepared for it.

[trickjohn]

I already had that lesson when I put the car back together after the winter rebuild - the pipes will be placed in a empty petrol container, Ive just picked the new pump up - so the car should run tomorrow - fingers crossed.

Sean

[pringli]

Best of luck

[trickjohn]

Its a runner after I put a brand new pump on (£56) and Ive got a grin ear to ear, I havnt taken it over 4000 RPM yet, because of the engine rebuild, it sounds really nice and is not dropping any oil - so some things went to plan.

Regards Sean

[pringli]

Congrats., now get yer top off and get out there, sun is is shining up here today in practice for BNG I hope. Sadly I'm at work until 730pm but I'll drive home the (very) long way around. (Now I've put the HID lamps in the Griff I'm no longer frightened of the dark)