What have you actually done so far, talk me through it.
I know you've probably done this already.
For FSDO :
I'd Make sure you have cleaned the entire bolt assembly,propshaft and can.
Replace every o-ring on the bolt and can, don't forget the #17 on the inside of the can. (Residue from paintballs can accumulate here)
Then regrease, making sure, you have the correct amount of grease.
Is your dwell,FSD Delay and FSD Compensation at the correct level? (Do a factory reset to the board)