Hi guys, I need help I’ve recently rebuilt my engine due to bent conrods. Now it won’t start I’ve got a spark and the timing is spot on. There is fuel coming out of the 4 unions on the metering head when I push the flap down but none when I don’t push it down. It is bobbing when it’s being cranked over. I’ve tried it with the cold start valve disconnected and it makes no difference. I’ve also unplugged the black box on the side of the metering head and that makes no difference. Someone suggested to tow it in 2nd gear but would that help?