Same boat here, V7 Sti. Engine had run a bearing & rebuild done by previous owner,engine done 2000k's in my ownership and then went for a tune by Pappu. everything was fine and then a week after went for runs with pappu again to check for knocks or any other issues if present nothing found, pulled fine till the road ended and then had to slow down, when put car in neutral engine would die out, then engage it in gear runs but no acceleration, few moments later hear knocks. have yet to pull engine out and send it to Marc