My car sputters and cuts out. It feels like it just falls off all of the sudden and the AF gauge is jumping all over the place. I had the car tuned and its turbo. If I watch the fuel pressure gauge it vibrates sporadically. Could this be the problem? And what is causing it?

 

it is possible if it is fluctuating very high to very low. what gauge is on it and is it liquid filled or is the isolator still on the rail? what shape is the ign system?

 

Well the ign system is a brand new msd the wires are old though... It didnt do this before i changed the head gasket so its almost like I stirred the turds and now I cant figure out what was stirred.