Sounds like you had defrost on. This would turn on your ac compressor which would rob power. Sounds like you should make sure you just shut off everything or maybe just turn on the vents next time.
Green 2000 SVT #1166
mods-K&N open air filter & Custom heat shield, Custom y pipe and 30 in resonator,DMD, arm rest heightened
http://www.geocities.com/savinoss/Cars.html other cars-89 sable 197000 miles and still going-Wifes car 99 Mystique V6 5 spd
