I just bought this 1999 firebird and the guy I bought it off of replaced the driver side window motor and when I bought it I seen that the drivers side door skin is separated in the front, didn't think anything about it. A few days later, I noticed whenever I rolled the window all the way up or down, the door bowed out. This is what made the door skin bust, so I took the inside of the door off and looked to see if a bumper is gone or something wrong, when I would roll it up or down it stop at the right spot but then it seems like the motor wants to keep going and puts pressure on the inside and outside of the door. Does anyone knows how to fix this or slow the window motor down?

 

I have read on other forums where Firebird owners have complained about the door panels cracking. Could this be what you're calling separating? I have no personal experience with Firebirds, but I have noticed the door on my Camaros flexing out a little as the window reaches the up position. The window motor is controlled by a thermal switch inside the motor. When the window hits the stop, the motor will continue to run by design until the thermal switch opens from the increased amperage draw from the motor pushing against the stop. Most of the time when a motor is replaced, it's because this thermal switch has distorted from heat and will no longer let the contact return to the closed position after it has cooled down so that the motor can run again. I would check to see that window regulator arms are not bent and that the slides are lubricated and not damaged. If the regulator arms are bent or binding, I would think that would cause more flexing in the door than the motor hitting the stops.

 

I will check the guides and all the stuff you talked about, thanks

 

mine came lose on the door handle end. the door skin was not cracked it came lose at the seam. I re glued it.