popping

When I shut or open any of the doors on my 'hoe, the doors are popping. I do not know if it is the hinges itself of the slide bar. Any thoughts anyone?!?

i have a 2007 that i have had soo many problems with the throttle body has screwed up and ive had to replace it, and the alternator as well as battery. Now i was going down the hyway and it started popping in the intake (backfiring) and had almost no accelleration. i gimped it home and checked...