after a long down time, we finally start putting my buddies DSM back together, it got totally built, from top to bottom, as we finish the liquids, its time to fire her up. we try to crank it over, and it trys, but at the same time doesnt sound like its going to start, we checked for fuel, and its getting fuel, we checked for spark, and only cylinder 2 and 3 were getting it....its not the plugs, wires, or coil. what else could it be? maybe something wrong with his MSD ignition? or maybe his DSM link? any tips?