I have a 2001 RS and about month ago I filled the tank up with bad gas. I've used fuel injector cleaner, heat, and octane booster to help get the water and dirt out. I've also installed a new fuel filter, spark plugs, and wires. Whenever I start from a stop the engine boggs and the car almost dies. It also runs very rough at a constant speed. Has anybody had this problem, if so what did you do to fix the problem?