1990 Porsche 964 Carrera 2. Was running fine and then put gas in it and whammo! It turns over, but just sputters out. Won't crank and the couple of times that it has, it has been ultra rough. I realize that without you hearing and watching it, it will be hard to diagnose, but we might be able to come up with something. Any suggestions? Thanks in advance.....

 

i suggest u to checkfuel system, problem must be due to when u put gas in it.