Failed Smog

[mandoz85]

I went to get my car smoged today and it did not pass the CO reading at idle. the limit is 1.20 and i got 1.30.

Every thing else was fine., i just did a tune up and replaced the o2 sensor. what could i do to lower the levels of CO.
Thanks
Mandoz85

[mistaanime]

lol..tune up shoulda worked...but you can adj the throttle line..mite be too high..or..MAF..is dirty...could be other things..but thats wut is did..and it's idlein at 900..

[phrozen]

run some higher octane gas and let it run for a good day or 2