An unusual and annoying problem has developed out of the blue. My son parked the Cupra in the carport about 2 weeks ago and it was running perfectly at the time. In fact he had been driving to Gladstone and back once a week a round trip of around 1,100k's.
When he started it up to drive it away it has developed an unusual misfire. It will run almost perfectly up to 2,400 rpm where it develops a random miss. The missing continues to about 3,500rpm when it clears and will rev cleanly to the red line. It is there every time and will even do it when free revving the engine ie not under load. It consistently starts at 2,400 rpm and you can drive it up to that point and you would not know there was a problem.
Hopefully someone will have come across this before and have an answer. Any assistance will be greatly appreciated as we have spent over 4 hours swapping bit over from my Cupra with no solution. My Vchecker could not find any trouble codes.
When he started it up to drive it away it has developed an unusual misfire. It will run almost perfectly up to 2,400 rpm where it develops a random miss. The missing continues to about 3,500rpm when it clears and will rev cleanly to the red line. It is there every time and will even do it when free revving the engine ie not under load. It consistently starts at 2,400 rpm and you can drive it up to that point and you would not know there was a problem.
Hopefully someone will have come across this before and have an answer. Any assistance will be greatly appreciated as we have spent over 4 hours swapping bit over from my Cupra with no solution. My Vchecker could not find any trouble codes.
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