I have talked with many people about older Z31's having problems starting. This, I'm told, is a larger problem on the turbo versions. The problem is that it takes longer than normal to start and once it starts is has trouble running. And don't even think about hitting the gas peddel because the engine will stall. But, once the engine has warmed up, it runs fine. This problem does not happen everytime the car is started. Has anyone found a solution to the problem? I have heard of people changing every sensor and rebuilding the engine and still having the problem. Is a wire or ground gone bad?