no deisel to pump

[wizzbilly]

anyone got any ideas no ecu just simple mecanical job .

not getting any fuel to fuel pump of even fuel fillter .

fuel solinoid is working have hard wired it , plenty of fuel new fuel fillter .

tried cracking open a injector but still no luck

its been stood for best part of a year and now getting frustraing any ideas welcome

[stevieturbo]

wizzbilly said:

anyone got any ideas no ecu just simple mecanical job .

not getting any fuel to fuel pump of even fuel fillter .

fuel solinoid is working have hard wired it , plenty of fuel new fuel fillter .

tried cracking open a injector but still no luck

its been stood for best part of a year and now getting frustraing any ideas welcome

Might help if you gave a clue as to what vehicle.

And when you say no diesel to pump, what exactly do you mean ? If there is fuel in the filter, of course there is fuel available to the pump.

[wizzbilly]

vw van .

its a new fillter all pipes are correct way around .

the fuel fillter is still empty after plenty of cranking , i have bipassed the imobliser so i no this is not at fault and can here fuel pump solinoid working , its just not getting uel to fillter nevermind pump .

have tried cracking open injectors etc to make sure no air blckages but still bone dry , have filled fuel fillter up and still no fuel getting to pump .

[sunbeam alpine]

I have a fork lift truck, which is very difficult to start if I ever let it run out of fuel, or when we change the fuel filter. What I have to do is to pressurise the fuel tank using a small compressor. I have a sort of pistol with a long spout, which I wrap in an old rag to create a seal. I then stick it in the filling spout and pump air in until the tank is under pressure. At the same time someone else is turning the engine until she starts.

Disclaimer - this works for me on a metal tank on a fork lift truck. It was found out in desperation after trying loosening off injectors etc. after changing the fuel filter, which is stupidly mounted the wrong way up on my fork lift. I've never tried it on any other vehicle!

[stevieturbo]

wizzbilly said:

vw van .

its a new fillter all pipes are correct way around .

the fuel fillter is still empty after plenty of cranking , i have bipassed the imobliser so i no this is not at fault and can here fuel pump solinoid working , its just not getting uel to fillter nevermind pump .

have tried cracking open injectors etc to make sure no air blckages but still bone dry , have filled fuel fillter up and still no fuel getting to pump .

so in otherwords you have introduced an air leak into the pipework so it is impossible for the pump to draw the fuel in ?

[wizzbilly]

opened the injectors so to make sure no air is in the system while cranking it over done it manyt of times on these engines and works everytime .

just cant even get fuel to fillter and have pusshed something from the fuel fillter back to tank to make sure no blckages but still no luck

[stevieturbo]

wizzbilly said:

opened the injectors so to make sure no air is in the system while cranking it over done it manyt of times on these engines and works everytime .

just cant even get fuel to fillter and have pusshed something from the fuel fillter back to tank to make sure no blckages but still no luck

air at the injectors has nothing to do with an air leak before the pump.

[wizzbilly]

but if air is in the system because the deisel having to hold presure it has to get rid of air in the system some how .

normall just open injectors till get some uel spitting out this gets rid of the air and while still cranking over close them and starts straight up .

opening the injectors wont effect the fuel getting to fillter and have tried it plenty of times with injectors shut still no joy .

[stevieturbo]

wizzbilly said:

but if air is in the system because the deisel having to hold presure it has to get rid of air in the system some how .

normall just open injectors till get some uel spitting out this gets rid of the air and while still cranking over close them and starts straight up .

opening the injectors wont effect the fuel getting to fillter and have tried it plenty of times with injectors shut still no joy .

You arent listening to a single word, are you ?

You have an air leak BEFORE the pump.

It's like you having a hole in your drinking straw above the level of drink.. You can suck all you like, but you'll just suck air.

[wizzbilly]

i am listening steve i no there is no air leak because i have renewed all the pipes and also preasure tested them and no leaks

[stevieturbo]

wizzbilly said:

i am listening steve i no there is no air leak because i have renewed all the pipes and also preasure tested them and no leaks

then either your tank outlet is blocked, or you are mistaken in your tests.

If there is diesel in front of the pump, which you have already claimed there is by saying the filter is full.

it is physically impossible for the pump to not have access to fuel aside from the solenoid which again you say is working.

So if it has access to fuel and cannot draw that fuel in. Either you are mistaken, or the pump is faulty.

And any VW diesels Ive seen in recent years have all been self bleeding. It can take some cranking, but they do self bleed.

[duncancallum]

are you getting anything out of the filter head.

If its been stood/aged the first depress can rip the diaphram in the filter head. This will stop it priming.

[wizzbilly]

Thanks for the replys .

have removed the deisel tank and renewed all the pipes from tank to fillter .

still not getting any fuel to the fillter it was a brand new fillter and after lots of cranking it was still empty so i filled it up by hand and still no look , have checked all relevant pipes and there is no splits or even pin holes .

the fact am not even getting fuel from the pump to tank leads to me to belive the only thing left is the deisel pump itself .

[stevieturbo]

wizzbilly said:

the fact am not even getting fuel from the pump to tank leads to me to belive the only thing left is the deisel pump itself .

Fuel is drawn from the tank to the pump

Have you tied a very basic test of a temporary diesel supply to the pump intake ?
Or even the extreme of actually pumping some diesel into the pump intake ?

And what were the conditions leading up to this issue. It sounds unlikely that it has just suddenly done this.

[sunbeam alpine]

stevieturbo said:

wizzbilly said:

the fact am not even getting fuel from the pump to tank leads to me to belive the only thing left is the deisel pump itself .

Fuel is drawn from the tank to the pump

Have you tied a very basic test of a temporary diesel supply to the pump intake ?
Or even the extreme of actually pumping some diesel into the pump intake ?

And what were the conditions leading up to this issue. It sounds unlikely that it has just suddenly done this.

Is it not possible to have a 2-pump system - one at the motor end and one on the tank? I have a vehicle which seems to have this system - an electrical tank on the pump and a mechanical pump at the motor.

[stevieturbo]

sunbeam alpine said:

Is it not possible to have a 2-pump system - one at the motor end and one on the tank? I have a vehicle which seems to have this system - an electrical tank on the pump and a mechanical pump at the motor.

From what he is saying, he has a very basic diesel setup. The type that would not have an in-tank pump.

But he has not given that exact information.

[veedubmadness]

GO BUY A BLUB/ DIESEL PRIMER FROM YOUR LOCAL MOTOR FACTORS TELL THEM ITS WOT THE OLD PUGS USED TO HAVE OR PULL 1 OFF A 205 DIESEL FIT IT B4 THE FILTER AND PUMP IT TILL IT DRAWS DIESEL IF IT DONT YOU HAVE A AIR LEAK SUM WHERE BACK FROM THAT FILTER TO THE TANK AS PREVIOUSLY STATED. OR TOW START IT IN SECOND GEAR WHITH IGNITION ON B4 YOU BURN OUT THE WINGDINGS IN THE STARTER.