okay i've just connected the pipes up i couldn't see any markings on the amal valve so guessed the car then was over boosting to about 16-18psi and then suddenly cutting the boost etc. So i swapped the pipes over but still is the same i had the actuator set at 12psi when it was just connected on its own and not to the amal valve etc. I had to also rewire a multiplug on the end of the wires so don't know if i done it the right way round etc. Are these palarity concious. And is there a way of testing the amal valve. It only had 2 outlets etc. And looks be a genuine ford one. Cheers