2004 Kia Optima Optima WONT START

Electrical problem
2004 Kia Optima 4 cyl Two Wheel Drive Automatic 79, XXX miles

We have a 2004 Optima that came to the shop. When received the owner said it would run for 20-30 miles then die, wouldnt restart until 4-5 hours later. We we received it we checked it out an showed to have a weak coil(figured it was heating up an quiting) so we replaced it. After it idled here in shop It was ran down the road about 2 miles down the road it quit. After we got it back to the shop it had NO fire nore is the Injectors firing. Took the timing cover off an the counter balance belt was broke. We replaced the counter balance belt, new timing belt since we was there an Crank Positioning sensor because the belt had smacked it up. But it back together have No Fire to plugs or to injectors. Got another CPS still the same thing. Also the OBD II has 12 volts coming to it but will not link. Please give me so help.