DI DIESEL PROBLEMS

[Luke]

do you have a return to the tank

the in line filter before the lift pump isnt a standard item - i'd try it without that - so long as you have the cartridge filter you wont damage the diesel pump

[comet]

same tank differant sender, so why change,

[Luke]

the only filter is the one under the lift pump and it new.thanks luke!

just to be clear when you say this .......... have you taken the sender out of the tank and removed the filter off the end of the pick up pipe or found it to have allready been removed

[redeemer]

the only filter is the one under the lift pump and it new.thanks luke!

just to be clear when you say this .......... have you taken the sender out of the tank and removed the filter off the end of the pick up pipe or found it to have allready been removed

Hi luke , yes I have a return to the tank and it isn't bloked because I checked it. Also I have the cartridge filter but removed the in line ordinary filter that there was. I have taken out the sender out of the tank and changed it since the fuel guage wasn't working and none of the two senders that I have , had this filter at the end of the pickup pipe. It might have been removed.
Also another point I forgot to mention is that wheb the engine is running at idle speed and you press the bleeding button of the lift pump the engine revs alone for some time and then return to its idle speed???? Cant it be a clue for the problem? Thanks everyone

[Luke]

hmmm

this is what i did when i had a similar problem - to diagnose if it was fuel pump or line/tank related!

i got a drum of diesel tied it in the engine bay against the steering column filled it with diesel and put the pick up pipe difectly into it - drove down the road see what it was like

with mine it was fine so i realised it was fuel line related but this was on an earlier engine that didnt have a lift pump

also what make of diesel pump do you have

[redeemer]

hmmm

this is what i did when i had a similar problem - to diagnose if it was fuel pump or line/tank related!

i got a drum of diesel tied it in the engine bay against the steering column filled it with diesel and put the pick up pipe difectly into it - drove down the road see what it was like

with mine it was fine so i realised it was fuel line related but this was on an earlier engine that didnt have a lift pump

also what make of diesel pump do you have

Hi luke! Do you mean that you drove the van by gravity? thats what we say here
the injection pump I dont know very well but it has like a blue piece of plastic shaped like a cone on the side , probably a bosh??? i dont know i have to check

[Luke]

sounds like the Lucas CAV pump you have as i think they have the blue bit on

[Luke]

Hi luke! Do you mean that you drove the van by gravity? thats what we say here

proberbly just a pipe from the desel pump strait into a can - didnt drive it for long as i left the return into the tank so it would soon empty the can but i did it enough to prove to me that my pump was ok

[redeemer]

Hi luke! Do you mean that you drove the van by gravity? thats what we say here

proberbly just a pipe from the desel pump strait into a can - didnt drive it for long as i left the return into the tank so it would soon empty the can but i did it enough to prove to me that my pump was ok

I will try that and if the problem is gone you think its the lift pump which I have the trouble with?
And if its the injection pump, can I remove it(so I take it to a diesel specialist or change it) without removing the timing belt cover and dismantling the pump from its timing pulley, because that means I have to remove all the front and radiator Any sugestions?

[FredTransit]

Could the primer pump be letting in air? We had one replaced once, made a huge difference. It's on top of the diesel filter on the CAV engine.

[sam l]

you can test the primer pump by asking it to pump from a closed line, it should stay in the down position and not move. If air is getting in it will move up again.

I know this cos I'm the muppet that tried to prime the engine with a mis-wired solenoid!

[Smooth Hound]

This is only a thought, but is it possible that the vave stem seals are starting to go, or one of them, which would mean that a bit of oil is getting past , and the engine is running on it , that would increase revs, and give vibration .

[redeemer]

Yes good idea sam I will try that tomorow and beacuse I m not hoping to change the lift pump right away since I checked its price it is 110 euros.

And about the valve problem mentioned but if oil is being burnt the engine exaust must be white or Im wrong and loss of power? And besides this problem the engine as far as I can assume has great power for example the van keeps going up a hill till the very top on the fifth g ear.

[Smooth Hound]

oil burns black not white, and it wouldnt be noticed if you were driving along at 3000 plus revs, as it would be burning it off, you would notice it as you reduced revs as it wuld race a bit faster as the sme amount of oil ould be getting past the stem whilst a lesse amount of diesel would be being injected into the bore because when you reduce your rvs it reduces the diesel injected in, it wold also cause vibration, as it is likely to be only one stem that has the problem, meaning that the cylinder with the problem would not only be burning he diesel you are injecting in but an addition of a bit of oil, however it would also mean that when you switch off the engine you would get a bit of judder and a run on for a second or 2 whilst it burns he oil that is in the cylnder. but as i say its only a thought. let us know how you get on, id be intereste as to what the problem turns out to be.you will know if it is that because it will get worse and orse until when you are ging along it will suddenly race along with a black cloud behind you and you will have to put your clutch in and come to a halt whilst it is still racing and smoking, you also will be unable to stop the engine or the smoke , due to the fact you will be running on oil in 1 cylinder which you cant turn off. and to cap it all once its happened a couple of times, it will burn the ring on that cylinder, and possibly burn the piston beyond repair, meaning a new piston, plus you will need to replace all the rings, because new rings on one piston only will men the compression on the one will be more than the others meaning a bit of unevenness from your engine.

[Luke]

if it runs better with a full tank of deisel i'd have thought it must be related - either fuel lines or lift pump would be my guess