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Hello,

we have a 2001 Lf45 2001 horse box which i need some help as it is becoming dangerous to use. It has always had a starting issue, the engine fires but the throttle does not make the engine rev, its as if it is not connected. Sometimes it “chugs” and stalls other times it runs but will not rev. If i take the key out and retry this may happen 6 times and then all of a sudden the throttle works and starting is not an issue that day. I have changed the filters, bleed the fuel system and removed the exhaust valve no difference. i had the codes read when we first purchased it and there was a code to do with number 3 injector having low fuel pressure but the engine runs fine. I could live with this issue but now after an hour or so driving if i pull up to a junction the engine STOP light comes on and the engine will not rev. If i remove the key it restarts fine and may not repeat for the remainder of the journey other days it may do this 10 times. It becomes a lottery as it dies as you go to pull away so i end up in the middle of a junction switching off the engine !! Over xmas i noticed whilst driving along the M4 the engine was hunting as i was driving along. The engine tone would change to a heavy diesel sound for a while the go quiet which it also does when it ticks over and when i pulled off at the top of the slip road both red and yellow warning lights appeared and the engine would only tick over. A quick switch off and on the it started up but this time it would not tick over but drove ok. The following day it was if nothing happened. I have changed the oil and filter in case was low oil pressure was stopping it from starting.Can anyone out there suggest what to try next, i will see if i can get the codes read again as something may have been stored.