I just bought a 2001 T190 with hi flow and hand controls. I just got it home and tried hooking up my plow to it. All the sudden the boom started to slowly raise and curl down. After alot of messing around I was able to get it to tilt back and lower when it was at a VERY slow idle. As soon as I turned the idle up it would slowly raise and not lower. Machine will drive fine, but seem a little low on power... help PLEASE!!