I posted this on TB.com also. No replies yet. I guess I should have put it in the form of a question. I am finally getting around to tuning my car. It seems like there has always been something pre-emting this for over 10 years. I'm now at the point where I really don't care. I noticed that the engine seems to like 11.5 to 12.5 A/F idle in park. When I put it in gear it goes up one to two full points in the A/F. This results in the A/F being at 12.5 to 13.5. It wants to stall at much leaner, and the throttle response is not good. I do have both the AE tables starting out at the left hand side of the screen at around 1/2 way up. This is not something I have seen on the few other GCTs I have looked at. It does seem to work and it does not affect the A/F until actuated by either throttle or MAP. I do notice some fuel smoke when idling both in and out of gear. If I lean it out enough to avoid this, the A/F slowly climbs to 15.94/1, so I have no Idea how lean it really is since that is the leanest that this box shows. I am not idling in closed loop. At least not yet. It seems like the A/F at idle is rich and I can smell the unburnt fuel as well as see the smoke, but I can't get it to run well when I lean it out. Maybe there is a physical problem like a sneaky vacuum leak, although I checked and didn't find any. Maybe the 269/264 (218/212@.050) cam and the max ported heads are partially to blame. Fresh engine 274 CID, M&A heads, 84lb injs, FAST classic seq box.