Hey y'all! I drove my 2006 Dyna low for 30 minutes with no problems. I parked it and came back 20 minutes later. When I left it started cutting in and out. 2 cylinders would fire then 1 cylinder and it just kept on until only 1 cylinder was running. I swapped out spark plugs, spark plug wires, and the coil pack. It is still only running on 1 cylinder. If anyone could help guide me in the right direction, I would greatly appreciate it.

 

EFI or carb....?

 

Stop buying parts until you find what is wrong.
Check for codes. https://www.fuelmotousa.com/p-29661-...ble-codes.html
Inspect both ends of both battery cables. Check the wires at the fuel injectors.
A fuel pressure test would help but if you can't get that done right away look inside the tank while priming the fuel pump (turn the switch to run but don't start it). You might have a hole in one of the lines or the regulator.
When it runs on one cylinder is it always the same one?

 

My bad, I didn't realize all Dynas went to only EFI in 2006, unlike the rest of the models that all went to only EFI in 2007...