Whith the cold weather moving in here, my engine has some trouble idling in gear. Its not a problem when its warm but when the car is cold, itll only pull around 9 inHg of vacuum in gear and it wants to stall when i switch from neutral/park to Reverse/drive. When its just idling in neutral or park its fine. For comparison, when the car idles warm at ~750-800 rpm in neutral it pulls 20 inHg in P/N and 16 inHg at 600 rpm in gear. I did increase the cool compensation spark and increase the air fuel ratio multiplier around those temps (~30-45 deg F) and it seemed to get the car to idle margionally when cold but its still not great. On a side note, though, i do have and always had problems with the fuel settling out and pooling around the corners of the carb intake im using. Doesnt happen when its warm but when its cold its a real problem. Lessened a bit when i got the VE table set up a bit better but it also started to idle poorly after I did that. It did used to idle ok before i began tuning but it also smelled strongly of raw gas when it idled. Im not sure whether the pooling is a fuel distribution problem or me adding in too much fuel at idle.

 

That in part is just part of dealing with TBI.
Until you get some heat in the manifold, to aid with fuel distribution, they're just going to be that way.

Sometimes taking some timing out of the CTS compensation is better. Add a lil more fuel with less timing can help. I think they run the timing up and keep it lean for a quicker warm out to get you out of that range quicker.

If your not running an air cleaner with the heat sensitive trap door you might consider installing one for cold weather use. And if you have a cold air kit it makes things even worse.

One thing that I've noticed is that seems to be a knee over point of 0-20dC for most cars. And depending on mods it can move that temp around. Meaning that at a given temp., things change to where there is an actual big step in fueling and timing in cold weather.

 

I used to have this problem with near stock ANLU calibration, since then my car will idle like it doesn't know nore does it care what temp it is outside! I don't know exactly what I did to make the car idle so well in this cold weather but it's so nice.
Oh, and we're talking about weather in the 30's, even lower at times because a couple mornings I've found ice on the windows.
I'll figure out exactly what I did and let you know, maybe it's just a whole lot of KISS approach. BTW, I'm running with no temperature SA compensation. I've been doing this for many reasons, mostly to just monitor by 2 degree increments what the engine wants by tip in feel and %TPS. So far it's showing no more than 4 degrees in any light accel cells.
Almost forgot, I'm running no EGR, no heat riser, nothing to help warm up the manifold. It doesn't even have the coolant passage hooked up and it doesn't have the rear coolant crossover like the stock intakes.
RUN RICH on cold startups.
Give me your bin in an e-mail attachment and I'll compare it with mine and let you know what's obviously different. I'm sure we can get this worked out through the code so long as stuff like your eprom is truthful to actual (initial SA and injector constant are correct).

 

Jon, I sent the bin to you...