fcukworkridemotocross · Feb 23, 2010

300tdi disco wont really pull in 4th and 5th and lumpy/smokey when started from cold!! have replaced fuel/air filter,cleaned sedimiter/intercooler/hoses. my lift pump wont manualy pump fuel out of bleed on the filter and has no resistance! i take it the lift pump pulls fuel from the tank into the filter when motor is running? how do they break and would it cause these kind of problems? any help would be great as getting bloody fed up now

Richard Martin · Feb 23, 2010

The engine has to be in the right postion to operate the lift pump with the lever, try turning it over half a turn (breaker bar with 27mm socket on the pulley nut on the front of the crank shaft) and try again.
I thought when they were giving up you got lack of power when pulling up hill, nothing to do with cold or not

fcukworkridemotocross · Feb 23, 2010

Richard Martin said:
The engine has to be in the right postion to operate the lift pump with the lever, try turning it over half a turn (breaker bar with 27mm socket on the pulley nut on the front of the crank shaft) and try again.
I thought when they were giving up you got lack of power when pulling up hill, nothing to do with cold or not

yeah tried turning motor over half a turn and nothing!! def losing power on hills but also 4th and 5th in general unless going down hill! seems to get hard to rev out in 3rd and flat there after!

nickh75 · Feb 23, 2010

lift pump could be shot but also look at the sedimentor bowl as it may need cleaning, it's located on the chassis rail to the rear drivers side, also check for splits/leaks in pipe work and also the tank sender unit tends to rust and prevent fuel pulling from the tank to pump.
hope that helps

Nick

fcukworkridemotocross · Feb 23, 2010

nickh75 said:
lift pump could be shot but also look at the sedimentor bowl as it may need cleaning, it's located on the chassis rail to the rear drivers side, also check for splits/leaks in pipe work and also the tank sender unit tends to rust and prevent fuel pulling from the tank to pump.
hope that helps

Nick

yeah cheers, checked this at weekend and yes was full of munk, good clean and made her tick over smoother but nothing else,pipes seemed ok aswell.

nickh75 · Feb 23, 2010

fcukworkridemotocross said:
yeah cheers, checked this at weekend and yes was full of munk, good clean and made her tick over smoother but nothing else,pipes seemed ok aswell.

my bro in law had similar problem, he changed the lift pump coz it was fooked, but problem was still the same,
it turned out to be the fuel sender,
the top pipes corroded but only slightly and it was pulling air in, enough to make it run like crap and pull badly
a new sender unit and it goes like **** off a hot shovel, he just needs to MOT it now

fcukworkridemotocross · Feb 23, 2010

nickh75 said:
my bro in law had similar problem, he changed the lift pump coz it was fooked, but problem was still the same,
it turned out to be the fuel sender,
the top pipes corroded but only slightly and it was pulling air in, enough to make it run like crap and pull badly

right! well for the sake of £25ish think im going to change the lift pump and fingers crossed......... and if not- besides burning the bloody thing il give the hoses/fuel system another check seems to be endless number of things on these discos that all can and have caused the same running issues

sofawizard · Feb 27, 2010

hmm looks like i have it BAD no fuel at the filter and no resistance on my lift pump primer just koncked going up a hill the AA were there usual hopeless and down rite hopeless selfs 4 1/2 hours from first call till i got home some 3 miles away a new record of incompitance ! the aa said my lift pumps goosed and thats all there monkey wanted to do 5 mins for him to tell me what id already guessed hmm money well squandered least they brought my disco home after much time wasted!

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