I always push my car hard...I actually jus got off the phone with a mechanic buddy...he said if I didn't gap my plugs right, that'd do all that...the metal to metal sounds would've been my tranny from all the jerking of the engine...he said for my year and model and engine type...i should gap the plugs .050 and it should quit immediately....I never knew plug gap could affect it that much, but it does make sense...