Paintball remote coil issues?

I just tried my new remote coil for my PM6 marker and Pure Energy 4500psi HP tank, aftertesting it out I noticed that after about 10 rapid shots that the firing power was dying (lack of air), so I would pause for 5 seconds and same thing 10 rapid shots and pause, I could even hear the air building back up during the pause, after I removed the coil and hooked the tank right up to marker and no issues, shot consistenly full power, so I know it's with the coil, any ideas why this is happening????