92' Prelude 2.3L Si.

Ok, now it seems a new starting problem has developed. If you look at one of my previous posts, I recently replaced the Main Relay, and a pile of other things. It definitely corrected an intermittant starting problem I had, and things were good for a little while. BUT, now the weather has started turning cold over night here in the Northeast, and three mornings in a row (low 30's) this car wouldn't start. It would start for a second, then quit. After that it would just crank and crank. It seems like it needs to be choked or something! But with PGM-FI, I have not idea how that is to take place.
But then as the temp. rises say around noon time, she fires right up, and it's good the rest of the day. Any ideas, please help!