Help someone, my blaster is very sluggish and doesn't rev very high it has a lack of power and will not get into the power band. I had adjusted the pilot air screw thing before it started the problem so could that be it, i pulled the plug out and its wet and black but it has hardly any power and you have to jab the throttle to make it rev high please help. Do i need to put that screw back to stock or what??