hello my son has an etek 4 hadnt used for a bit then put a bottle on and was fine then pulled trigger to test and air just kept coming out of the barrel so stripped down and put new exhaust valve in it greased it up then tested again and original problem wasnt there anymore (air out of barrel) but it does not have any pressure coming out the barrel at all .so changed all o rings on gun reg lpr reg everything except solenoid so am wondering hoping aint solenoid seems strange that original prob is gone so have i done something wrong putting back together ??
