Cleanup turns to mess up. Need some help troubleshooting.

Ummmm, you need to fix this issue because it will plague you with any engine. Exactltry hwere are you measuring the 5.1V? At the coil +?

Set the spark wire from the coil so that the end is 1/4" from metal. Use a jumper to ground the coil - while the key is in ON and then unground the jumper from the coil -. You should get a spark. (DON'T be holding the metal of the jumper wire when you do this!). This test will check the coil. If that sparks thenm the problem is in the ECU or distributor pickup. BTW, did you set the pickup gap with a non-magnetic feeler? Not steel...