Buddy has a Pontiac 400 in his GP and he just bought a new HEI but not GM. He wanted to backfit a non-CCC HEI and could not find an original GM. I was explaining to him about timing an engine by removing the spark plugs and grounding the wires, then spinning the engine while setting the timing. He tried that but he thought he could ground the wires to a rebar stake in the ground. 'Like on a house' is what he said. After I admonished him he did it the right way and timed the engine. But now the engine will not start. It has fuel, is timed, but just coughs when you try to start it. I am wondering if by having all the spark plug wires NOT grounded to the engine, could the module have been blown? Or damaged so it will still trigger an inductive timing light, but not ignite plugs under compression. What do you think? And how do you test a module besides just replacing it?