I have a 93 concorde 3.5 that stalls with no codes. It happens when the cars in park I rev the engine then take my foot off the gas and sometimes when I'm driving. After it stalls it starts right back up. I don't know if its related but my gas gauge (both analog and otis) doesn't work and sometimes my trunk pops by itself. I've already changed the idle air, catalytic converter, and decarbonized the engine. Any suggestions.