Ford Focus 1.8 Tddi 1999 wont run with less than 1/4 tank

[SambaS]

Anyone had this problem or heard of it? We've replaced all fuel lines, and had the tank out for inspection of pickup pipes etc. Conks when going up hill too

[Rocket88]

Apparently, this is an issue with ye olde Rover 75 as well. On that the cause is the failure of the first of the two fuel pumps [the one nearest the tank. or in the tank, not sure] the under bonnet one has to do all the work, and can't cope once the fuel drops to a certain level. This is probably no help at all, but may be worth checking if Ford use the same system

[Cavcraft]

Aye, if that us the case it sounds like the in tank (lift pump?) is knackered. Does it fire up with easy start if car has under 1/4 tank? If so I think that would prove Col's theory.

[Lacquer Peel]

I don't think the TDDi has a separate lift pump, like a lot of older diesels the injection pump does all the work. Does it run fine with more than 1/4 of a tank? You didn't mention replacing the fuel filter.

[cobblers]

does 1/4 a tank actually mean 1/4, or is the guage shit and 1/4 means empty?