smoking help please !!!!

[evileclipse420]

my car is smoking when i am backing up. like anytime i rev it in while im sitting still,or trying to back out of a driveway. i have never seen it smoke when im going forward, and i have paid attention to it. not alot, but a fair amount of smoke. it appears to be white. i have act2100 with 3,000 miles on it , so i dont think its that. any help would be really appreciated. thanks.
PJ

 

[Sean485]

White is ussually coolant, does it use any coolant? Does the exhaust smell "sweet"?

 

[I-luv-em-all]

Search, there are plenty of forums out their on smoking issues. But white is coolent (HG, cracked head or water jacket, cracked block.)