went riding last weekend. all of a sudden bike started to sputter and miss ect. noticed the check engine light on when it ran crappy,light then went off bike ran mint. this kept happening at random until it got so bad had to pull over.let bike cool down then ran ok for a short time only to repeat the same all over again. managed to limp home and found code p1355.replaced coil and tried stock plug wires, still have problem. checked ecm connector and all wires look ok. possible ecm module? 06 efi heritage classic thanks for any input.

 

Are you sure it is an electrical issue? Could it be bad gas? Check all connections, crank sensor, do a wiggle test on the injector wiring, etc.

 

Simple stuff first.
Clogged fuel filter, hole in fuel line inside tank are common trouble areas.
Intermittent issues can be also from battery and ground connections not being tight and clean.