2002 Accord fuel mixture problem?

Intermittately my accord will not start correctly. Istead it go into a rough idle and the engine will not stay on unless I keep accelerating.

If I release the gas the RPM drop and the engine cuts out. If I press down the gas and get the RPM up to 6000 or so I'll eventually clear the problem until the next time.

I use to fly airplane and it sounds like the mixture is to rich.

I have checked the computer and found no trouble codes. I put in a couple bottles of fuel system cleaner which didn't work either. I have cleaned the carb and check the recall notices. I also changed the spark plugs.

Tomorrow I'm going check and clean the idle air control. The only other thing I can think of is to change the fuel filters but those are in the gas tank and thats not easy for me to get to.

Any other ideas?