hi i have a 00' mustang 5spd, 94k, 5spd. I have noticed that whenever generally when the temperature changes alot i have very horrible acceleration until i've driven for awhile, sometimes not, its on and off. I just replaced the fuel filture 1k back. current modifications to my car was 70mm throttle, bbk intake, MAC long headers, duel borla exhaust with h pipe, chiped, billit flywheel, and i just got a new rearend <stock>, and new coilpack <stock>. My dad has the exact car just with out anymods and he doesn't have any problems with acceleration with climate change.