Spyder Pilot Problem?

Yeah My Problem with the gun is that when i shoot the gun it tends to act like the air is running out. i put the co2 tank on my spyder extra and it works. this is the only gun that doesn't work. the metal coil from the bottom of the gun to the chamber broke off and i put the EXTRA gun coil into it and it works with no leakage. but the problem is still with the one shot pull trigger. any suggestions without going to a paintball store to pay for their fee