D5254T (to 2002, Audi) - 850 Tdi lift pump

Young Dave · Mar 27th, 2011, 11:10

Hi guys i have a question.

Does the 850/V70 tdi have a lift pump in the fuel tank?
When i took my rear seats up there was a fuel pump in there but all the wiring looks out of place (not the ususal volvo standard) and ive got a replacement part off ebay and there is no fuel pump in there.

I have heard that this system is self priming so im now concerned that if there isnt supposed to be a lift pump then it is over fueling the engine.

Thanks in advance for any help.

NI_Volvo_Nut · Mar 27th, 2011, 12:39

It shouldn't be able to overfuel the engine, the injection pump shouldn't allow it, it should return any excess fuel back to the tank

nexarius · Apr 4th, 2011, 18:32

If it helps, my 97 v70 tdi does not have a lift pump... I don't think they have them as standard.

Mar 27th, 2011, 11:10	#1
Young Dave DaaaaaaaaaD Last Online: May 8th, 2020 23:56 Join Date: Jul 2009 Location: Nuneaton	850 Tdi lift pump Hi guys i have a question. Does the 850/V70 tdi have a lift pump in the fuel tank? When i took my rear seats up there was a fuel pump in there but all the wiring looks out of place (not the ususal volvo standard) and ive got a replacement part off ebay and there is no fuel pump in there. I have heard that this system is self priming so im now concerned that if there isnt supposed to be a lift pump then it is over fueling the engine. Thanks in advance for any help.

Mar 27th, 2011, 12:39	#2
NI_Volvo_Nut Volvologist Last Online: Dec 6th, 2023 11:13 Join Date: Aug 2008 Location: Bangor - Norn Iron View Photos By: NI_Volvo_Nut	It shouldn't be able to overfuel the engine, the injection pump shouldn't allow it, it should return any excess fuel back to the tank __________________ What's the matter with the car I'm driving? Can't you tell that it's out of style? Should I get a set of white wall tires? Are you gonna cruise the miracle mile?

Apr 4th, 2011, 18:32	#3
nexarius Junior Member Last Online: Aug 21st, 2011 10:46 Join Date: Oct 2010 Location: Reading	If it helps, my 97 v70 tdi does not have a lift pump... I don't think they have them as standard.

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