discovery 300 tdi EDC problems, help please.

ok , the usual, 300 tdi EDC (jap import) discovery 1996 75K on the clock.
a slight engine mis at (aprox) 1500 to 1750 rpm bit clears after that.
on the road if i use kick down or go up hills the engine pulls strong till about 2750 RPM then it seems to feel like its got fuel starvation and misses.
if you just tickle the throttle it will just reach about 75MPH ,but put your foot down and it will only do 60 MPH.
all the fuel system has been checked,
new fuel filter.
checked air filter (K&N) , cleaned it but did not re oil as still in good condition.
inter cooler has been cleaned and new silicone pipes have been fitted (all before problem started and ran fine)
cleaned sedimenter, no water, no crap inside, all new O rings (fitted correctly)
tank pickup pipe removed/ cleaned and blown through with an air line no crap inside.
all fuel lines blown through with an air line even the return pipe
no crap inside any of them.
when blowing through i placed a clean piece of white cloth at the ends to catch any crap, each time it was clean..
new lift pump fitted (Delphi), removed , vacuum checked against the old pump (both the same) then re fitted.
none of the parts used have been Mickey mouse, all have been quality items.
it is running on good old pump diesel, as im not an eco warrior NO veg oil has passed it filler neck
just wondering if anyone has any ideas as to what the problem could be and could shine some light on it.
i am based in the Bristol area, if anyone close has a Hawkeye that is set up for a 300 tdi EDC discovery and would like to earn some beer tokens for a diagnostic reading , please PM me.
thanks.
Neil

wastegate pipe on the turbo split?

not that i can see, turbo spools up ok when under load.
thanks.
neil.

wingnut1 said:

ok , the usual, 300 tdi EDC (jap import) discovery 1996 75K on the clock.
a slight engine mis at (aprox) 1500 to 1750 rpm bit clears after that.
on the road if i use kick down or go up hills the engine pulls strong till about 2750 RPM then it seems to feel like its got fuel starvation and misses.
if you just tickle the throttle it will just reach about 75MPH ,but put your foot down and it will only do 60 MPH.
all the fuel system has been checked,
new fuel filter.
checked air filter (K&N) , cleaned it but did not re oil as still in good condition.
inter cooler has been cleaned and new silicone pipes have been fitted (all before problem started and ran fine)
cleaned sedimenter, no water, no crap inside, all new O rings (fitted correctly)
tank pickup pipe removed/ cleaned and blown through with an air line no crap inside.
all fuel lines blown through with an air line even the return pipe
no crap inside any of them.
when blowing through i placed a clean piece of white cloth at the ends to catch any crap, each time it was clean..
new lift pump fitted (Delphi), removed , vacuum checked against the old pump (both the same) then re fitted.
none of the parts used have been Mickey mouse, all have been quality items.
it is running on good old pump diesel, as im not an eco warrior NO veg oil has passed it filler neck
just wondering if anyone has any ideas as to what the problem could be and could shine some light on it.
i am based in the Bristol area, if anyone close has a Hawkeye that is set up for a 300 tdi EDC discovery and would like to earn some beer tokens for a diagnostic reading , please PM me.
thanks.
Neil

Click to expand...

hi have you had any luck solving the issue as we have 1 here with the same symptons.all feedback greatfully received.also have a fault code coming up 142 injection begin sensor.

hello, well hopefully yes.
i had an air leak on the fuel filter, the thread had gone on the bleed screw.
i re tapped it to M8,fitted a bigger bleed screw and the problem seems to have gone.
for now.
dont know if this is any help to you, if not good luck.
regards.
neil.

Fuel starvation and misses...
I had similar problem with my Disco, it stalled few times on the motorway too

It turned out to be faulty injector no4; the one with the sensor. ERR 3337 Fuel Injector
I was lucky to get one on eBay; no one makes them anymore.

if you fit some clear pipe from the filter to the injection pump you will see bubbles if air is getting in to the fuel system,

its worth doing on any diesel as it's difficult to diagnose otherwise, as above you go to a lot of trouble changing filters and cleaning fuel lines and if its air you have just wasted time and money .