My Hyster H50FT has the GM Vortec 2400 Motor. I have had a forklift mechanic out for over 4 hours at this point. We have replaced the spark plugs, wires and the coil (since then we have also replaced the las section of harness leading to the coil). The coil has no spark coming out of the 1 and 4 connectors. No check engine light or codes. - checked the camshaft sensor, it checked out. I would think a bad crankshaft sensor would throw a code.

I am leaning now that there might be a problem with the computer

Does anyone know how to troubleshoot the harness to see if I am losing signal to one side of the coil?