Hi i have a lumpy idol on my supercharged sport i have done some reading on here. i have the p0171 and p0174 codes i tried the carb cleaner and cant see any difference my maf seems to be correct its at about 102kpa i have been looking at the long term fuel trim and it's between 8% and 22% .I do not know if the fuel filter has been changed would you think that should be my next port of call thanks

mine also has a rough idle. had someone look at it and he said that the valves in the heads may need changing as its been run on lpg

steve

As I have a diesel obviously no experience with the SC but the manual says:

For P017100 System too lean bank 1 and for P017400 system too lean bank 2

Air intake leak between MAF
sensor and cylinder head
MAF sensor fault (low intake
air flow)
Fuel filter/system restriction
Low fuel pressure
Fuel injector restriction
Exhaust leak (before catalyst)
Evaporative emission system
fault

Check the intake air system for leaks, etc. Check the
fuel system for restrictions, DTCs, etc. Check the
exhaust system for leaks, etc. Check for evaporative
emission DTCs.

Definitely worth changing the fuel filter unless recently done (or maybe even if it has)  2008 MY Java Black TDV8 HSE

Thanks guys steve was that an indy who said that mine is lpg converted but don't know how much its been used but also has a oil injection system to lube the engine so hopefully no valves to be reground and paddi i have checked as far as i can i have checked the intake side with carb cleaner so my next port for cost i think is the fuel filter thanks for the input guys

Not sure about the earlier S/Cs but in the later 5.0L the fuel filter is a integral part of the fuel pump and is not a serviceable item, it is located inside the fuel tank, so tank would need dropping to gain access to it. Not sure but based on L/R prices wouldn't imagine a genuine pump will be cheap.

Cheers
Col

yes geoff, there is a mechanic near me who knows his stuff when it comes to land rovers, he connected his kit to the car and said that every cylinder was coming up with a misfire and on a run the car felt a bit underpowered, i also have the oil injection system installed, he said cost would be about £1000 + vat to have both heads repaired.

for every day use its not causing me any problems but i will probaly have it done in a few months

steve

thanks Steve mine does not feel under powered at all and once not idling it's fine so i assume my heads arnt knackered

Hi Geoff, i didnt think it was under powered, i tought it was pretty rapid, it was the mechanic when taking it for a test drive, that told me it seemed under powered compared to other sc models he has driven, might be worth getting a code reader on your car to see what codes are coming up

steve

Nothing comes up apart from the P0171 and P0174

Col wrote:

Not sure about the earlier S/Cs but in the later 5.0L the fuel filter is a integral part of the fuel pump and is not a serviceable item, it is located inside the fuel tank, so tank would need dropping to gain access to it. Not sure but based on L/R prices wouldn't imagine a genuine pump will be cheap.

Cheers
Col

geoffsnook wrote:

Nothing comes up apart from the P0171 and P0174

geoffsnook, did you solve that problem

Well not had those codes up in ages after i changed oil and i did see the oil filler was not seated properly but i am waiting for a slot with anew specialist who the garage i use has found who apparently is hot at fault finding

Lumpy idol...





 Steve.

 Steve.