Still not running AHHHHHHHHHH HELP!!!!!!

[Fingers Mclean]

I just don't know where to start :(bigcry): I thought i had sorted out the problem but i had a 1hr of it running ok,now Iam back to square one  :(bloodshot): ,I have cleaned out my diesel tank and the filters and it still don't run properly, it will start ok ish and tick over fine but as soon as i put the foot down it revs to 4 grand then down to 1 then up to 2 then down again and white/grey smoke is coming out...the engine is fine no knocks and the turbo is fine i have checked that :(bigcry): what's going on :(bigcry): please help me :(bloodshot): oh i forgot its a 300TDI

[robbie]

eerrgghh!!! no idea what is wrong mate but it dont sound too good....

Hope it doesnt cost an arm and a leg to fix it

Good luck

[PUX]

i know u probaly have checked but have u checked the colour of the oil is it milky??
and have u checked u have not lost any water e.g is ur head gasket blown and wot colour is ur smoke and smell

[Fingers Mclean]

The oil is fine not milky and no water loss :-k  ](*,)

[H]

I'd say head gasket gone between a oil gallery and a cylinder, doesnt take alot of oil to make alot of smokeand it doesnt nessacarly have to have blown between the oil and water hence no mayo or water loss, This would be my 1st guess, however is could also over fueling due to some sort of blockage in the air intake, when was the air filter last changed? Do you have a snorkle that someone may have sabotaged by dropping something down?

H

[Fingers Mclean]

Air filter is new from Allisport and i do have a snorkel..But i dont think thats the problem...Its never overheated and was running fine up until now..What about the fuel lift pump?? would this also do it???

[H]

Air filter is new from Allisport and i do have a snorkel..But i dont think thats the problem...Its never overheated and was running fine up until now..What about the fuel lift pump?? would this also do it???

only if its over pumping white smoke from a deisel if its fuel related is over fueling, If the lift pump was faulty I would expect it to me not getting enough fuel. I'm affraid I dont know the disco diesel engine that well just going off general deisel engine knoledge, is there any kind of air flow or MAS sensor in the intake?

H

[Fingers Mclean]

I dont have a clue???

[Xtremeteam]

Air filter is new from Allisport and i do have a snorkel..But i dont think thats the problem...Its never overheated and was running fine up until now..What about the fuel lift pump?? would this also do it???

only if its over pumping white smoke from a deisel if its fuel related is over fueling, If the lift pump was faulty I would expect it to me not getting enough fuel. I'm affraid I dont know the disco diesel engine that well just going off general deisel engine knoledge, is there any kind of air flow or MAS sensor in the intake?

H

over fuelling a diesel is black smoke & white smoke is water  
do you have a K&N filter fitted??

that might not have helped the engine much  
take the filler cap off & see if it chuffs from there,if it does headgasket has gone,

have you had the rocker cover off yet??
the 300's have a habit of pulling the back stud out that holds the rockers down so you loose power etc

[rollazuki]

Had a similar prob myself, turned out had petrol in my diesel. Ok from start up, but after a minute or two, no power, revs all over.

Double check fuel quality.

Lift pump fault usually causes engine to die. Have seen a few faults in the workshop where people have run bio-diesel and its shagged the lift pump. Have you??

Check theres no minute leaks between the tank and the high pressure pump.These will drag air and cause all sorts of running/starting faults. Take off the fuel filter and remove and clean the sealing ring on all sides, thats a fave air leak point. Just check sll the pipes/unions etc.

[Fingers Mclean]

No smoke out of the oil filler cap???????

[Xtremeteam]

bio-diesel and its shagged the lift pump

is that Vo or proper Bio diesel?? your talking about??

Run Vo in mine for a bit & goes better on the stuff

[Fingers Mclean]

I have been running bio fuel up until last month :oops: But the disco worked fine on it until the cold got here and i have a pre heater installed.. so do you think it could be the pump???

[Xtremeteam]

is the pre heater a webasto kind? what does it run on??

[beast5680]

you havent got water in the diesel? that would cause the sort of running probs you describe?

[Fingers Mclean]

I have this fitted
http://cgi.ebay.co.uk/ws/eBayISAPI.dll?ViewItem&item=4597020085&ssPageName=MERC_VIC_ReBay_Pr4_PcY_BIN_IT
and no i dont think there is water in the fuel as i have cleaned the tank out..

[beast5680]

you dont think maybe you have had water in previously which may have jiggered the pump? also sounds like the governors in the pump are playing silly beggers

[Wanderer]

Is the tickover lumpy when it's on tickover and warm?

If so you may have damaged the springs in the fuel injection pump.

Been there done that.

[Xtremeteam]

I have this fitted
http://cgi.ebay.co.uk/ws/eBayISAPI.dll?ViewItem&item=4597020085&ssPageName=MERC_VIC_ReBay_Pr4_PcY_BIN_IT
and no i dont think there is water in the fuel as i have cleaned the tank out..

are you running on VO??

if so what ratio you on?

mines takes 50/50 with no heater & if you feel the fuel filter when its running its hot

[Fingers Mclean]

Is the tickover lumpy when it's on tickover and warm?

If so you may have damaged the springs in the fuel injection pump.

Been there done that.

If i have how much do you think i'am looking at???
Also the mix was 1/4 tank to 3/4 vo but i have not run that in about a month  :roll:  :roll:
Has vo got a load of water in it then to screw up the running?? :?

[petergalileo]

Grey smoke on a diesel normally means lack of fuel.  White smoke is water, black smoke too much fuel, blue smoke is oil.

If smoke is grey its normally lack of fuel.  Blocked filter, kinked fuel feed pipe, very slight air leak in fuel feed pipes.

Its been a long time since I was a bus mechanic but I am pretty sure when we had some smartass driver put sugar in the fuel tank that produced white smoke too.  I dont suppose some stupid kids done it to you have they ?

[Xtremeteam]

Is the tickover lumpy when it's on tickover and warm?

If so you may have damaged the springs in the fuel injection pump.

Been there done that.

If i have how much do you think i'am looking at???
Also the mix was 1/4 tank to 3/4 vo but i have not run that in about a month  :roll:  :roll:
Has vo got a load of water in it then to screw up the running?? :?

Not normally,just have to change the fuel filter after the first 1k miles as it lifts all the crud out the tank,did mine yesterday after i run out of fuel & it had water & VO in the bottom o the filter,i run 25 litres VO to 15 diesel normally but at the mo it 35 diesel & 5 VO,Now on pure white fuel as i run out yesterday trying to be smart  :oops:

[colintandy]

if you checked obviouse take a look under the four bolts holding top of the fuel pump take off take diaphram out check position befor mark it pull out check for wear on it also check that the spring is ok and if you can get somethink like a cotton bud and have a good clean down there put back the way found ..is only a guess but keep hunting you will find it soon  :D good luck :lol:

[Fingers Mclean]

ok guys I have just bought a pump of eblag brand new for £25 :?  so when that turns up i will fit it and see what happens>>>What a day its been   is this the pump you mean colintandy??? or is there another one??/ :?  :?  :?

[Fingers Mclean]

Another thing guys the leaver at the side of the pump whats it for :oops:  :oops:  And if i undo the fuel line and press it should anything come out or not...(DUM landy owner) :oops:  :oops:  :oops:

[Xtremeteam]

the lever is for priming the fuel system up to the inhjection pump,did u get the nuts & olives u will need to fit it?? should take about 1/2 hour to fit & bleed the system,

thats the only pump on the tdi fuel system,just had a thought,it might be drawing air from the fuel sedimentor located on the inside edge of the O/S chassis rail at the rear wheel

[H]

thats the primer, to prime the pump should you run out of fuel it pumps the fuel through to the lifter pump so that the lifter isnt pumping air

[Fingers Mclean]

So if i take the fuel line off going to the fuel filter and prime the pump should fuel come out of the pump ???Yes??? :?

[Spooky]

Yes, disconnecting the outlet and operating the lever should produce fuel ... However, the pump needs to be 'off cam' for the lever to work - if there's no resistance when you lift the lever, rocking the car (in gear, of course) will turn the engine slightly, thus moving the cam away from the pump and allowing the lever to work fully ...

Just don't forget to take it out of gear again before going for a start ...

[Xtremeteam]

Yes, disconnecting the outlet and operating the lever should produce fuel ... However, the pump needs to be 'off cam' for the lever to work - if there's no resistance when you lift the lever, rocking the car (in gear, of course) will turn the engine slightly, thus moving the cam away from the pump and allowing the lever to work fully ...

Just don't forget to take it out of gear again before going for a start ...

or put it in neutrol & flick the starter to jog the engine slightly