also i have a question for you peva. Remebr how my computer was witching between po 325 and po 420/430 codes? well i reset it extra long like you said ( i think it was you). Well, i pulled my codes again after the long reset and i got the po 325, po 420, po430 as well as po 128 (i just replaced the thermostat a few months ago) and a po 440 for evap system. My gas cap is on tight and i just replaced the thermostat. my computer keeps switching codees. Do you think my computer is messed up?