Djet Idle problems, Rich? Options

[Hammy]

So overall my engine is running fine (1.7 djet) but I have a few minor problems.

My AAR didn't seem to be working so I took it out and soaked it in penetrating oil and it still didn't work. I didn't have anything to plug up the AAR hose ports on the intake elbow and on the air distributor (to further look into the AAR on the bench), so I just put the AAR back in but left it's electrical connection unplugged (Since it seemed to be stuck shut anyways).

So now of course when I start the engine up cold I have to manually hold the idle up. I do that for about a minute and drive off. For 30 minutes or so after starting up, my idle stays at 1400-1600 rpm. WTF? Is the AAR suddenly magically working even though I have its electrical lead unplugged?

Next, I'll turn the engine off for 10+ minutes and get back in. Starts up fine and I can drive off. But then from now on the idle is complete shit at under 400 rpm or so. I have to keep my foot in it to keep the engine from possibly dying on me. I figured this was the normal warm start over-richness but the low idle doesn't seem to go away at all within time. Once in a while the idle will set down to normal (800) for a short time but then starts bogging down low again.

So what could this be? Is it possible my idle enrichment (ECU knob) is set too rich? Or do I simply need to bring up the idle on idle screw? I wouldn't want to do something to fix/patch up the problem when the real culprit was something else......My gas mileage seems to be on the low side, and I seem to smell fuel when pushing the engine hard. I checked obsessively for leaks but can't find anything. Thanks - Zack