Timmy2 has the key to the castle. You can't make up your own firing order 123456!!! The cylinders are named by location, not by firing order. The firing order is set with the timing of the valves and a fixed order that you MUST follow. Car will never run if you don't.
The cap can only go on one way. Make sure the wires are going to the correct corresponding cylinders. OEM wires have numbers on them. If you don't have numbers on them, label them for sanity on both ends.
Hope this helps!!! I'd be over for a cold beer if you were closer to help. It happens to the best!
G