heres a pic of what i mean by the ground fluctuations. Funny, your passenger door is making a noise you think. Your ECM is also nearby, both use a chassis ground I think... Anyway, the window motor is the draw that is a huge amp draw, then it starting and stopping is a lot of current that uses a ground path that may happen to also be where a ECM has one. this would throw TPS off, as example. (run diff)