Like it says.. Is there an easy way to tell if my power vavles are working? I'm sure they worked last season. I had it in for service and now it seems that I have no top end at all and the sled won't run at the right rpm. It also seems to be burning a alot of gas as well. I noticed that its not running the power valve cleaning cycle at start up either. Is there and easy way to tell if they are working or not?