92 LX Problems... TPS? Tranny?

Hi all, I was referred here by Chief, I run Speed-Society that you see sponsoring the Acura Forum.

Anyway, I'm having a problem with my Accord, and I thought I would run it by you guys, because I'm more of a Nissan guy, but the one good thing about my Accord is reliability. Anyway, back on topic, today I went to get my car smogged, and it failed, my o2 and CO were too high, not by much mind you, but still not passing. Luckily I have friends, and I got it to pass, they played around with it, and got it working, I couldn't get a straight answer out of them though as to what exactly they did. I just wanted to know, because I know what I'm doing with engines, I just don't feel like messing around with my Honda (I did my SR20DET swap, so I'm not a n00b).

So anyway, this is my question. Lately, my car has been idling REALLY low, like between 400-500 RPM. The other problem is that when I put it in reverse (Auto), when I start backing up, and the RPM is <1000, it feels really lopey or bumpy, hard to describe, not like the lopey feeling when you have warped rotors. But if I accelerate enough to get it over 1000 RPM, it stops making the lumpy feeling. It's a little bit harder to notice in drive, the easiest way of making it do it in drive is during hard braking.

Anyway, anybody have any idea what the problem is? I'm assuming it's something to do with my idle because it only does it below 1000 RPM.

The other thing I am wondering.... could the low idle be what caused my car not to pass smog on it's own? I didn't ask if it failed just at idle or at idle and at 2500.

Opinions appreciated, TIA.
ryan.