MY car 94' del sol is Rattling like around 3000 RPM its the worst. I have not any idea what it could be. the engine still is running well and such and it feels the same. the noise seems to be centered near the air intake area but i don't know any ideas? did i screw my engine up? it seemed to have started when i hit VTEC in 3rd gear and it felt like nothing happend. Please help.