engine almost died

[nissan~240sx]

yea i was driving along and when i went to slow down, the engine began too go to like 300 rpm and just sputter until i gave it some gas, then it went back on. now it did this twice in the same day. it happened two days ago. now i drove it today and it was fine. here was the scenario, it was kinda chilly outside and i didn't let it warm up too long. is that why it did that or do u guys think i have something else thats wrong?

just to let u kno, i put spacers between the hood and the brackets to bring more air into the engine, now do u think the cold weather has something to do with this?

[WWJD]

if it's only does it when it's cold then I would say yes. If it's does it a normal temp. (after being driven) then I would say that it's not the weather. My car hella sputter's when I don't let it warm up. once in a while it's will die in the morning.