noiseboymart

Active Member
200tdi
Morning
Started the old girl up this morning and set off.Sudden loss of power (hadn't even got out of 1st gear) and settled to a really rough idle .With a bit of coaxing on the throttle came back ok for a few hundred yards then dropped off again and carried on like this. Not had chance to have a look yet but any pointers what to look for gratefully received. I am thinking a fuelling issue but don't know what.
Thanks in advance.
 
I'd start at the air filter and follow onto the whole air inlet system to the turbo, checking hoses inside for de-lamination/cracks etc. Air filter may have got wet and clogged up.

Then check the fuel filter and fuel system back to the tank, including the sedimenter. Don't try the white tap on the sedimenter, just take it off (11mm bolt on the top, awkward) it gets filled with crap and jelly like stuff!
 
Agreed........

Start with the filters both air and fuel..

similar problem i had a few weeks ago.. turned out to the the fuel pipes that come out of top of fuel tank had corroded so much they were porous and air was being sucked in.. replaced the fuel sender under boot floor and alls good..

remove the inspection plate in the boot floor and have a look at the pipes..
 
OK so got round to looking at it. Air filter replaced in July this year and looks fine along with all air hoses. I have replaced the fuel filter under the bonnet and the problem still there. On start up will idle then rev up and sit at 2k then slowly dies off almost stalling then comes back up and repeats. When I changed the fuel filter filled the new one up with fresh diesel before fitting. I did loosen the bleed screw and hand primed the pump however no fuel came out of the bleed screw though there was no resistance what so ever from the prime lever but I Dont know what it should feel like.
On nicks suggestion got the boot cover off and found the top of the sender unit full of fuel and started it up again to find diesel spurting out of the return line connector which now has me totally confused as I was thinking the pump was on its way out starving the engine of fuel but now it is pumping back down the return line yet there doesn't seem to be enough pressure to force it out of the bleed screw on the filter.
 
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Lift pump is fecked-or loads of air getting in somewhere.
With engine running,undo bleed screw on filter and fuel should dribble out as you loosen-if not, injection pump is doing all the work.
Fit a clear pipe between filter outlet and injection pump inlet-no air bubbles allowed-bet yours is full of air.
Rare for a injection pump to fail-lift pumps fail regularly and are cheap-delphi best.
 
That sounds like it might be the problem. I didn't know the injector unit had a pump in it so that's what confused me with fuel coming back down the return line. Looks lovely like a new lift pump and sender unit then to get it going might do the sedimenter bypass thing as well as that looks extremely cruddy. Cheers
 
i replaced lift pump, no better..

then replaced sender and all better..

do the sender first as it might not be the lift pump... but if ya got fuel on top of sender ya definitely got a problem there...
 
Well replaced sender unit as nick suggested.Bypassed the sedimenter at the same time as the pipes into and out of it looked shot.Fired it up without priming the system and seems to be fine now.Thanks for everyones input.
 

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