Engine fires then dies immediately

[tranceatlantic]

I bought a 986 two weeks ago, had no problems until yesterday when it wouldn't start. It turns over, seems to fire but dies immediately. My OBI says there are no problems. I unbolted the hose on the passenger side fuel rail. I think it's the return fuel hose. On start up it flows a steady stream of fuel. So I'm guessing it's not a fuel problem. I noticed the Bosch idle controller is humming but other threads say this may be ok. I honestly didn't notice it before but I wasn't looking forward for a problem .

Now I'm out of ideas. Please help!