I have a 2004 chrysler crossfire that seem to stall when I get to a light or stop sign when I get ready to pull off it hesitate. The check engine light came on but when I went to have it checked it went off.I did notice if I put 93 grade gas in it don't do it as bad.This also started happen when I used lower grade gas in it that is when I notice the problem but the guy that checked said it sounds like the transmission is going bad.Can someone please help me.?