Cutting out

[layalog]

Hello all I’m after some help please
2.5di 1998 pats removed few months ago

Yesterday driving van admit foot on floor engine kept cutting
Out then back on again before I could take my foot off I carried on it kept doing it for about a mile got to builders merchants came out started and no problem on way back to job 5miles
This morning again flat out cut out for 2 to 3 seconds then started missing pulled over it cut out before I could turn it off it wouldn’t start so gave it 5 mins then tried it started nice and fast as usual went to work no problem I did drive it easy kept starting it all day and it was fine
On way home tonight drove fine taking it easy then after about 6 miles lost power and was missing managed to get it home shaking itself like made. Any ideas ?

[Altransit]

When was the fuel filter last changed

[layalog]

About 12000miles ago

[cherniy_chack]

layalog,from your post I could not understand what kind of fuel pump you had.
Bosch or Lucas EPIC?

[layalog]

Hello yes it’s a bosch

[layalog]

Looks like we got a slight weeping from back of pump of diesel could that be it

[Altransit]

About 12000miles ago

I would try another one. It could be partially blocked, or have water in it

[cherniy_chack]

I live in a country where everything is possible, but there was no water in the fuel.
Check the presence of water in the filter simply-unscrew the drain plug and drain some of the liquid from the filter.
If there is water, replace the filter.
No water-tighten the stopper.
I think the problem is not in the water, the problem is most likely in the faulty fuel pump shut-off valve or the power wire of this valve.
When dirt in the filter motor normally works at low loads and quickly stalls (cut out) under load, but not instantaneously.
If the water from the filter gets into the fuel pump, then this is a big problem.

[layalog]

Ok just been out to van it’s running fine again but desiel is nearly running out now from between the top plate and the body of the pump doesn’t leak from the throttle assembly has anyone ever taken the top of and is it possible just to unscrew the four Allen bolts and change a gasket
Leaking on joint where I’m pointing at

[cherniy_chack]

layalog,dirt and water in the filter is a systemic and persistent problem. It manifests itself constantly.
The situation "works / does not work" is usually associated with electricity.
In this fuel pump, only one node is connected to electricity-this is a cut-off valve.
The problem is either in it itself, or in the valve supply wire.
Your finger indicates the valve-regulator of the internal pressure of the injection pump.
Probably, it is badly tightened. Perhaps, the rubber sealing ring is damaged.
You can try to tighten the valve with a carabiner key by 10 mm.
Maybe a fuel leak on the gasket between the pump housing and the lid?
I still do not understand the Google translation well enough.
You can tighten the M6 bolts with a 5 mm hexagon in the head.
I do not think that this will give a result.
To replace the gasket in the injection pump it is better to consult a specialist.
On the photo there are no signs of interference in the injection pump, perhaps a "tear" -something old?

[layalog]

Cherniy
It is defiantly leaking between pump housing and lid do you think the pump has dirt in it and making it pressurise do you know if it’s a gasket or a rubber bead

[cherniy_chack]

layalog ,if there was no unqualified intervention in the fuel pump, then a leak on the gasket between the housing and the lid is extremely unlikely.
In case of leakage on the gasket, you should contact the professionals if you do not have sufficient experience of fine metalwork and do not have a gasket.
The gasket has a special shape and fits into the groove.
The normal pressure in the body of the fuel pump depends on the speed and is 5 ... 10 bar.
Your finger indicates the valve on which this pressure depends.
If this valve was unscrewed, a little fuel could get on the fuel pump housing and leave a trace that you consider a leak.
The Bosch fuel pump sometimes has a fuel leakage along the stem of the gas lever or
on the joint of the body with the divider head of the plunger pair, but these leaks do not have much influence on the operation of the motor.
Dirt into the fuel pump can not get-all the fuel passes through the filter.
But the rubber element of the cutoff valve can be destroyed.
In this case, there may be problems with engine shutdown.
Rubber pieces can cause sudden pump and motor failures, but problems with power supply to the cutoff valve are more likely.

[Chug]

It could be the rubber gasket in the lid, if you are sure its from there and you are mechanically competent, then have a look at this rebuild guide, scroll to near the bottom of the page and you will see the lid and its odd shaped groove where the rubber gasket sits,
https://www.vwdieselparts.com/forum/vie ... php?t=6694

Found another showing top removal https://forums.lr4x4.com/topic/15329-ho ... tion-pump/

its Bosch part number 1 461 015 302
https://content.invisioncic.com/r226025 ... 839824.jpg

[cherniy_chack]

Chuggy,great illustrations!
But I think that the reason for periodic sudden failures in the power supply wiring of the fuel pump shutoff valve.

[layalog]

It’s a good point it probably is something. Else but I’m going to try and sort this leak out as it is running out even when it running fine I got the top off just hope I can put it back together and it still runs