After removing the cross over intake, I found that resonance valve that only had half of its flap. After putting vacuum directly on the valve it open and closed, but when running the car it would not open yet the other valve on the cross over pipe does which is fed the same vacuum when the car is running. I did all of this to check the valve because of poor performance when cold only. The glow plugs are all working and the car starts right up without any problems when cold. The problem starts on acceleration when cold. After warming up the car it runs fine.