[Kiwi]

I'm a nitro person, nitro can be more straight forward than electric if you know exactly whats going on 100% of the time and know exactly what you're doing.

Your engine is running too rich, set the HSN and LSN to the factory setting and begin leaning it from there, remember that adjusting the HSN will directly effect the LSN since the HSN controls the fuel flow before the LSN ever sees it, the LSN's job is to keep the the ratio of fuel and air the same throughout the entire throttle band. That's where most people get thrown out of the game by adjusting the needles not knowing what they're doing.

Don't assume the worst like it's your exhaust that whenever you experience a problem.