A/ lamda sensor

B/ plug leads/ coil lead

C/ amal valve

I have a misfire on my escort cos, when the car is cold it's fine, but when it warms up it will not go past around 16psi ( car is stage 3 on greens )
It's like it's low on fuel or something! I have replaced crank sensor and phase sensor but still no joy. Can anyone please help as i'm going mad