racing96gt

ok i was driving and thought that i would stop in a parking lot a get on it, well i did and went to go into second and it acted like it really had no power, awhile back i use to have a v6 and it would bark in second and sometimes in third! so im puzzeled. the car does smoke white smoke out the drivers side when im just idling, it has 150,000 miles. thought anybody might know thanks.