I just bought a '91 7.3L with an E4OD. The kid I bought it from said it was idling roughly and started hard when hot, but always started easily when cold. It drove fine, and started hot several times while I was testing it, so I bought it. I let it cool down a couple of hours, and it doesn't start, doesn't even blow smoke, doesn't even cough on starting fluid. Any thoughts on where I should start troubleshooting?