Originally posted by DarkOne
it's the O2 sensor. Who would you rather trust, a parts monkey at AutoZone, or me?

OK Darkone and Fly1... I did thought about the O2 sensor.
and now you guys mention about the O2 sensor will make the ECU to give more or little gas that effect idle.
But 2 things I am not sure.
1) Why giving it more gas will fix it? should that still make the ECU think it's screwed up?
2) I told the autozone guy to erase all the code, and now, drove for 2 days and no code pop out... how come? ALso, if really O2 sensor problem, how come sometimes it works fine?
Like yesterday and today, it start right up perfectly after I fill up the tank with gas....

I am very lost...and my g/f is like bugging me... her car is not drivable! Please help!

Ok, if it is REALLY the o2 sensor... how can I check it? use a voltmeter and see if it cycle from .1 to .9 at idle? like my A/F gauge? will that work? please help guys!
Gil