So finished putting everything back together after replacing the headgasket and upon start up the car idled at about 400-500rpms for about 45-60sec then died out. It starts maybe 1 out of every 15 times and will do the same thing. There is no response when pulling the throttle aside from one time for about 5-10 seconds it revved up. There is fuel pressure. The car ran fine aside from BHG symptoms before hand. I only got to spend about 30mins looking for a solution last night as it was already late. If anyone has some suggestions on what could be the cause it would be appreciated.