I had the same problem today, during TO, I engage the AP right after I lift off and raise the gear, It climbs at 6000fpm. The speed slows to stall and my throttles is almost maxed out to avoid stalling. Don't seem like manage mode is working at all. I know this AC don't have VNAV, but how do I get it to follow a ftl plan, does the AP automatically fly the plan when engaged??