just bought my 2nd mm after totaling my 1st.2004 drives good seems to have nice power. has new alt, iac put my old maf and new cops off my 2003, plugs looked good, has cai and liddo tune, jmod, cooling mod. when at idle the car runs about 700rpm and i can feel through the brakes like it has a miss. no engine light or anything exhaust sounds like crap pop..pop..pop..pop. does have a little smell to it. i can watch it idle around 800+ and it will all of the sudden drop a couple hundred and the lights start pulsing along with the miss. any ideals??