Idling trouble... I'm miffed.

[vex]

I've checked the obvious: Vac leak, TPS adjustment, etc etc. Now I haven't had the BAC fully hooked up (the solenoid wire broke) until today. I've gotten it to idle rock steady at 1000rpm which is exactly where I want it right now. But as soon as I hooked up the solenoid it idled just fine. Went about 100 ft and all of a sudden my EGT's started splitting (front rotor going about 200 degrees hotter than normal) and the oscillating idle started. Shut it down, checked it all, no problems found.

I then decided to adjust the idle and get it set and dialed in properly with the BAC fully hooked up. No dice. I get it to about 1500rpm and it still oscillates. I thought perhaps a vac leak, but I see no obvious leak. All possible locations on the manifold are capped off, or tapped for use with other vac/boost powered objects. I scanned over the charge piping and it's all tight and connected.

To make it back home I unhooked the solenoid that I just fixed (soldered the wire back in), and adjusted my idle to around 1000rpm. Everything's fine. The reason I don't want to leave it like this is that when the engine is cold it has a tendency to stall out, I would prefer not to heel-toe it to keep it running until it has warmed up.

Any thoughts or suggestions?

Of note I seemed to be having trouble with the RTek around this time, though I'm not sure if it's a symptom or a cause. The RTek 3D fuel map would give me an error of "unexpected table size" but if I checked under table all the values were still there. It was quite peculiar. Any thoughts/suggestions?