Ok look set the DWELL back to its default or just raze it 10 clicks flashes beeps (what board you got)
now look down the feed neck when the bolt is out, you will see 2 o rings 1 either side it the feed neck, if you put the bolt in and slid it up and down the firing chamber you will be able to feel and see them.
Got that good REPLACE them and it won’t leak
you can get a o ring kit form here
www.paintballwarehouse.co.uk by return of post if you call Mel and say you want a ion o ring kit 0845 370 3666
Get a hose kit to,
Have you cleaned the solenoid too????