its not the sedimenter and not fuel lift pump

following on from my last post on this
my mates early 300 tdi disco lost all power
so following some thoughts on here we changed the fuel lift pump
no joy still the same
went to empty the sedimenter and there aint one
start motor up it runs as sweet as a nut give it some revs and all power goes and it nearly stalls let the throttle off and tickover resumes fine
hes well ****ed off he aint out in it for over 4 weeks
any ideas?

wiltshire landyman said:

following on from my last post on this
my mates early 300 tdi disco lost all power
so following some thoughts on here we changed the fuel lift pump
no joy still the same
went to empty the sedimenter and there aint one
start motor up it runs as sweet as a nut give it some revs and all power goes and it nearly stalls let the throttle off and tickover resumes fine
hes well ****ed off he aint out in it for over 4 weeks
any ideas?

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Is it an auto with EDC - if it is, it will have a fly-by-wire accelerator pedal with a potentiometer. Sometimes these can be a source of running problems.

Cheers

Dave

hi no its a manuel...without the electronic fuel pump im told

wiltshire landyman said:

hi no its a manuel...without the electronic fuel pump im told

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Ah, so you have a spanish model, that explains a lot. It'll probably run fine manjiana


Sorry, my little joke. Have run out of thngs to suggest.

You have checked/replaced the airfilter right? They are only about £3 a time from Paddocks so I usually get 3 at once, then I've always got stock.

Good luck

Dave

tried it with air filter in and air filter out no difference

you aint mentioned the fuel filter???

I have never seen a 300 without a sedimenter? I have seen them under the floor above the axle and I have seen them put behind the O/S rear wheel but never completely omitted?

Try getting a CLEAN container of fuel and connecting straight to the lift pump. If all runs ok it could be be just air or blocked filter as someone else mentioned.

If still runs bad and we assume new lift pump is good then take out the stop solenoid PLUNGER and put the solenoid back without plunger (you will need to stall engine to stop it).

Sometimes these will jam half way and not let sufficinet fuel through or the rubber stopper on the end comes loose and does not open properly.

If still running bad then perhaps the diesel pump itself needs attention,


regards

Dave

ya changed the fuel filter fuel lift pump works and fills the filter by pumping it