My 04 had been fluctuating more than usual while stopped and would randomly turn CEL on/off. Pulled engine cover off, took filters out and wiped everything down with a microfiber. Intake tubes as well. There was a lot of dust build up at the tube connections and a couple leaves/bugs laying up by the filter. Shook the filters out and put everything back together. Acting much better and *** dyno says it's pulling slightly harder in mid range but that could just be in my head engine light went off right after doing it though. 10min job might be worth a shot