My LET engine is playing up.
It misses above 4500 revs and wont rev to more than 5400 revs. Iíve put new plugs and OEM dizzy cap in and swapped the leads for another spare set.
If I back off the throttle it revs to 5000 ish then starts missing again.
Dont know if its connected but when the turbo is spinning down thereís a bit of a grating sound coming from the turbo, could this just be that the turbo is a bit worn. I fitted a dump valve a month or so ago and cannot remember it doing it then ?