I started my sled and it idled good, backed out of shed and m idle was running around 1100 rpm. Found out that my sled was running on only 2 cyls. the right one wasn't firing. Any one know what the problem could be? I checked comp. and the plugs. They are fine. HELP PLEASE

What sled?

Check resistance on your spark plug cap first. The cap will unscrew from the wire. It should be 5K ohms. We had to replace 2 caps on different machines last ride out.