i went to get some new tires for my car, but when i started it up it was skipping or something, took it down the road and opened it up, and up to about 4 grand it sounded like i was only running half the engine, but after that it was fine, i changed the plugs and am running injector cleaner at the moment, seemed to clear it up some, any one else have this problem or know what else could be wrong, i recently changed plug wires too.