TheSandTrap.com Top Picks
Could be a lot of things
1) if your weight is falling back, you chould be flipping at the ball, shutting the clubface down and hooking it
1) if you have good weight shift, you could be comming from the inside to much, and a square clubface to targetline would cause a straight to hook shot.
The fixes for these are two different things. So with out a video its hard to say whats going on. I guess the easiest would be to open the clubface up, and see if that causes a push draw or a push. If so, then your probably looking at the 2nd option. Which you might have to get the swing less from the inside, or weaken the grip.
Every once in awhile i have this problem as well, especially with my driver. I made a thread about it a couple weeks ago and Golfingdad commented and linked a video with a tip that i tried out and seemed to help. Although i have only been to the range once since then.
Heres a link to the video