T copter troubles

Good evening I need advice again. I just got through replacing the esc's in my T copter and it has developed a new problem. I am almost sure I know the cause but I wanted someone to agree with me. My problem is the front two motors seem to get very warm and it will lose power and finally set down and not lift with the front motors the rear will still lift. I had alot of trouble getting the soldering done on the front motor connections and think I may have some bad joints. Can cold solder joints cause this problem? That is my thought anyhow i just need confirmation befpore I spend another hour resoldering everything.

Thanks