Chicken Drumstick Posted March 17, 2021 Share Posted March 17, 2021 Got a Td5 Disco that isn't running right, won't rev right and tops out at about 50-55mph. Have checked the wastegate/actuator, etc and no codes being thrown. Feels a bit like fuel. Have replaced the fuel filter in the rear wheelarch and put a diesel cleaner through it. It has improved slightly, but still not right. Is there another fuel filter somewhere on these or anything else anyone can suggest? The vehicle used to run really well, but has sat for about 12 months. Quote Link to comment Share on other sites More sharing options...
taurion Posted March 17, 2021 Share Posted March 17, 2021 Injector Seals? When were they last changed? Is the fuel pump in the tank covered in a grey/black film of combustion soot? Quote Link to comment Share on other sites More sharing options...
Nonimouse Posted March 18, 2021 Share Posted March 18, 2021 What pressure is your fuel regulator running at? Quote Link to comment Share on other sites More sharing options...
Dave W Posted March 18, 2021 Share Posted March 18, 2021 Fuel pump problem I'd expect. It's a two part pump unit, low pressure and high pressure. It'll run quite happily up to a point off the low pressure pump but will top out and be unable to rev high for any sustained period. Often you can hear the pump isn't well when you switch the ignition on before starting. If you keep it at low revs it'll run quite happily but as soon as you apply any load and/or higher revs it'll have no power. Quote Link to comment Share on other sites More sharing options...
Escape Posted March 18, 2021 Share Posted March 18, 2021 As above, check the fuel pump. Or go for the easiest possible fix first and add some injector cleaner. Could be enough if it's just crud somewhere. There is a secondary filter behind the fuel pressure regulator, but I haven't heard of one crudding up. Filip Quote Link to comment Share on other sites More sharing options...
Chicken Drumstick Posted March 18, 2021 Author Share Posted March 18, 2021 Thanks. Pump sounds ok when you turn the key. But haven’t checked it beyond that as of yet. Has had some injector cleaner through it. But yes, the driving sensation would seem to match. Quote Link to comment Share on other sites More sharing options...
JohnnoK Posted March 22, 2021 Share Posted March 22, 2021 On 3/17/2021 at 9:37 PM, Chicken Drumstick said: Is there another fuel filter somewhere on these or anything else anyone can suggest? There is a small strainer in the head, under the fuel pressure regulator that is very fine and will clog easily if any gunk makes it that far. 1 Quote Link to comment Share on other sites More sharing options...
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