Hobbywing Justock and SP sportsman 17.5 jittery

[dopeydog]

Hi All,

I bought a Justock and a Speed Passion Ultra Sportsman 17.5 from people on this forum in the last couple of weeks.

I got it all fitted for the first time today. I turned it on and it seemed to work ok. But as soon as I went to full throttle. It would go jittery and the green light flashes. The manual states that either the cable is not plugged in correctly or the motor's sensor board is faulty.

Could someone please advise me on this. Is my motor faulty?

Any help would be much appreciated. I have a race on Sunday I'd like to partake in.

Cheers,

Tim