I am having problems getting my sled started. It appears to have spark. It appears to be getting fuel. I know it has compression. I just put pistons and rings in the sled. It ran for about 5 miles around the house, but now I can't get it started again. The spark looks weak. I tried starting fluid. Nothing won't start. Would it run with a weak spark. Lucky for me I have a 2000 ZL 500 EFI sitting right next to it that I will use to test differant parts til I find the problem. BUT I am looking for any ideas. This forum seems to have a couple great experts who have helped others, so I figured it was time for me to look for some help. The dealer will be my last resort.