I turn to the collective knowledge of this place again.
Last Sunday in Wales I noticed a very weird behaviour of the car and wanted to get opinions on what issue could this description point at:
Basically, when we went through a ford at speed, for around 5-7s afterwards the car was almost stalling and running at around 1500rpm with clutch released, leading us to believe I may have been in third, only for me to chuck it into first and same to happen again, which is when I declutched and selected first again to no avail, still running at around 1500rpm and not seeming to accelerate at wide open throttle. That lasted for around what felt like an eternity but perhaps was only between 3 and 5 or 7s. After which the car seemed to have picked up the pace again and we happily pulled away up the steep hill.
Remembering now the speeds were extremely slow, so I doubt I was actually in third or I would have otherwise stalled, but the engine hesitation felt very unusual.
My theory was it might have been a partial hydro shock to the engine as some water might have gotten into the cylinders since I removed part of the dirty side air intake ducting that was pointing at the wheel arch and the leftover air intake just before the filter is now pointing directly downward. It is not too low, as it is at about headlamp height but the fact that it's pointing downwards may or may not have played a role. I've also already had suggestions that it might have been a wet coil pack, which I have no experience of, so wouldn't know how that feels to judge.
I once again welcome all and any suggestions, advice or even honest shots in the dark for me to investigate.