Outer Limits 4x4 Board

Hey

me n a m8 just converted his F70 to turbo and we only haver the diesel pump to go b4 we can crank it up.

Problem is the bugger of a thing isnt pumping and diesel from the pump into the 4 lines to the injectors.

What we have done is put the boost diaphragm off the turbo motor onto his NA motor/diesel pump.

Which was a str8 swap and nothing looked any different on/in the pumps.

Have we just not bled the lines proply?
Is there a certain way to bleed the injector lines that we dont know about?

Any help appreciated, i will try to answer any q's that will help u understand more.

Thanks

Jon

What did you do when you bled the pump?
Undo the bleed screw, pump the manual pump until fuel came out of the bleed screw and did it back up again?

If you did all that, you should be able to crank the motor over and get some fuel coming out of the injectors, enough to start maybe and then crack each injector with the motor running to bleed air out of the injector lines.

If you're not seeing any fuel coming out of the lines then possibly the diaphragm is out of adjustment now that you've swapped it over.
It's possible now that the motor isn't getting enough fuel to run, maybe try adjusting the diaphragm or holding the fuel cutoff lever in the start position, full back, and see if you can start it.

A bit of aerostart or the like might also make things a bit easier to get going too.

Once you get prime up to the fuel filter and tighten the bleed screw i usually keep pumping a bit so that fuel flows down into the pump and then out the return feed back to the fuel tank.
If you've had the injector lines off and need prime them I usually find the best way is to remove the glow plugs so there isn't so much load on the starter motor, then loosen the lines at each injector then crank until fuel comes out. This can take some time depending on the repairs carried out.
Otherwise that's it (assuming a rotory pump). If it still doesn't work either the timing is way out or there's something wrong with the pump. If you cant get fuel to come out the injector lines check the fuel stop solenoid mounted on the back of the pump is being energised.

Good luck.

have you used turbo injectors or are the N/A ones still in it?

both look exactly the same to me

diesel pump was the only differnce asit had the boost diaphragm on it.

so we put the boost diaphragm on the N/A diesel pump.

we primed the pump 2nite but battery went flat on us b4 we could crank it enuf to get diesel up the lines.

charge battery, try again 2moz i suppose.

You should try it with the original pump which you know was working.. and try to add the anaeroid later on when it's running. It will work without it fine.

just askin cause i fitted turbo injectors to mine today

still goes so cant complain

stiiiiil not goin

been cranked n cranked n cranked n no fuel gettin up the lines.

Buggered if i know

is the fuel tank pickup still goin? etc

its gettin fuel from tank (it has a full tank)

it gettin it to the primer, gets it thru lines to pump, comes out pump bleed valve.

a m8s dad who is a mechanic reckons maybe a solenoid of some description?????

anyways my m8 had the lines off at the pump yestrday n no fuel came out when they cranked it.

so i think they r guna replace this solenoid with the 1 off the other motor n c how it goes.

Yeah there's a solenoid that controls the fuel when you start the motor, when it runs, and when you turn it off.
It's connected to the fuel pump by a little connecting rod which you would have had to remove when you took the diaphragm out.
When you turn the key should see it move around.
There's three positions it can be in, full forward is off, it cuts the supply of fuel to the injectors and lines off at the pump. This is what happens when you turn your car off with the key.
In the middle position is run, this is where it usually sits when your motor is running, and is also where it sits when the connecting rod is removed.
The last position is full back, which causes a little bit of extra fuel to be delivered to the injectors and is only used during starting.
The start position isn't 100% necessary, my car doesn't ever use it on account of the solenoid control circuit going a bit crazy and me replacing the system with a bit of cable.
My car is always in the run position until I pull a cable in the car and the motor dies, no starting enrichment.

As for what's going on with your car:
I had to put a new diaphragm in my car when my old one wore out and got a hole in it.
When I put the new one in, it was really hard to start and would hardly run at all.
From memory I had to adjust the screw on the back of the diaphragm to give the motor more fuel, I suspect that is what's going on here for you too.