Hey people's, i have just got a new engine like just under 50000kms ago, just done my gear box like 2 weeks ago. Just done my coils and spark plugs several days ago because i thought that was the problem. The problem i'm having is i drive round in my car for a while then ill pull up somewhere like as in i'm going to turn my car off and then it sounds like it drops a cylinder and starts shacking the whole car. I took it to a few people to see what they thought and they said coils, but it don't seem to be them as i have replaced them. And it seems to do it when its mostly hot?

So does anyone here have an idea on what it maybe causing this trouble for my car toplay up like this? cheers.. Kyle.