So I failed emissions...

[KarateBoy]

My readings were 1.04 for HC and 9.2 for CO

The legal limit for HC is 0.80 and 15.0.

I passed the CO limit by a decent margin but I'm obviously not burning enough fuel.

I ran the test on mid-grade so 93 V-power alone probably won't get me down the extra 0.24 points.

I've been reading that running injector cleaner helps a lot. Does it matter if I pour it in before I tank up or not? I think not as it would all mix together anyway.

I think its also important to not that over the last 2 weeks or so my idle has been getting rougher.

I was standing in line with my car on and not only would the idle flucuate from 500-750 rpm but the car would shake a little? Could it be knocking?

Thanks in advanced