At this point I would only suspect the idle adjustment being set to low. But check the air filter and ensure its clean. If not replace it. Still stalls then adjust the idle up. The big screw on the throttle body does this. Get the car warmed up and then start backing out the screw to increase the idle. It shouldn't make much difference to its cold speed.
If this doesn't work reply to this response with the changes and lets see where I can point you.
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