Have had tons of spark problems. it would go from a good spark to no spark then good again, replaced all 4 coils an power pack, then had good spark on 3 cyl.s..... sierra took back the new powerpack and sent me a new 1 and now I have great spark on all 4...230volts at all 4 coils with engine running
...glad too see they stand behind there parts, now just need too finish carpet job and a little paint work, 3 batteries and a trailer tire an will be ready for the lake..............