Question for the engine experts:
I went away on a trip this week.
Bit of a long story, but the airport I'm flying out of is short one of 3 runways due maintenance, so there are large ground delays. I had about a 30min delay on the ground while awaiting various clearances. It was quite a warm day. On takeoff I had a noticeable stumble at about 3/4 throttle which cleared almost as quickly as I noticed it and arrived at full throttle. By this time I was airborne. No other issues noticed for the flight.
I put it down to fouling due to the protracted ground running.
It repeated on the subsequent takeoff . So clearly there's something amiss and we are now grounded. I pulled the data and to my surprise, both 4 and 6 appear to have gone quite cold momentarily.
My first thought is it must be fuel related but Im curious to hear where others think I should start.
Its a IO540 with one mag and one surefly. AFP FI. Aircraft plugs.
I recently installed turbo rails but I've done around a dozen flights since with no issues.