conduct a heated O2 test on both sides, even if the first stage of ecu diag returns code 55. found my passenger side was dead, so i replaced it...and it works beautifully now. i could have saved a lot of money on gas if i just found this problem a long time ago. thanks dan (chivas) for helping me out in 30 degree weather =)
p.s. the stillen x-pipe + 30 degree weather ROCKS!
mike zxredline@yahoo.com
Follow Ups
FIXED! for with horrible gas mileage >> - stockplayerz (NYC)18:22:11 12/05/03