Discovery holding back

Just changed the lift pump on my 300 tdi(95) all bled ok. Now on my way to work it seems to struggle to get over 50 mph? Air Block ? Cheers

Check the fuel pipes at the fuel tank. Remove the boot carpets, undo the 6 screws holding the tank cover on and see what the Nylon to pipe fittings look like. If they have cracks in them then they're likely to be the culprit, letting air in. Only real cure is replacement sender unit, even epoxy doesn't work too well or for long ...

Fuel filter would be my first thought, why did you change you lift pump??

oldskool said:

Fuel filter would be my first thought, why did you change you lift pump??

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I was doing a service and lift pump arm on my old one was kaput , Can't do much now as I'm in work. I'll look when I get home and bleed it again

oldskool said:

Fuel filter would be my first thought, why did you change you lift pump??

Click to expand...

+1. Change the fuel filter first and see how that goes

I know this has been done a million times, but what brand of lift pump did you get? Was your car working perfectly OK before the lift pump was changed?

These are self bleeding systems so if the pump is working OK then it should be a case of fit, crank it over and away you go.

Thomo1927 said:

I was doing a service and lift pump arm on my old one was kaput , Can't do much now as I'm in work. I'll look when I get home and bleed it again

Click to expand...

Was it sluggish before you changed the lift pump?? what condition is the lobe it runs off of??

Thanks for the replies , All sorted now . It was only the top hose had blown off at one end , push back on, tighten up and away to go

:doh: