I just installed a 2.6 Metco supercharger pulley, steeda tensioner, spark plugs, JLT 123mm CAI, and Tuner. I installed all these parts and the car occasionally seems to crank over and then idle between 1300 RPMs and 300 RPMs, then die. The car tends to smell like it's running a little lean afterwords. But other times it idles at about 1100 RPMs and drives like a charm. Ideas?? I loaded it with a custom tune that came with the kit for all these parts from Lethal Performance.