There was this time when I took off the whole airbox and was checking if there was room for a Tornado Fuel Saver.... no room for 2-3 in. and I was told to save my money on it. Sure thing! Anyways, after I put it back on and started to drive it down the street, when I changed to second gear @ 3000 rpm the idle slowly went down and landed @ 2500 rpm. Don't get me wrong, the pull was awesome @ 2500 rpm every gear change, but I didn't like the idle @ 2500 rpm. Resetted the ECU and it was fixed. Recently, it happened again, but not as bad. It's cold here, so idle when I start the car everyday is @ 1500 rpm. I think the ECU is still training itself. I have had this happen to me twice in two months, so I thought I might share it. Just my two cents...