can anyone tell me if AEI UNITS are supposed to be silent when engine is running mine makes a slight ticking noise or air leak you can also hear it from inside the car when i put my ear to the aei and give it a gentle rev you can hear a leak or a ticking with the engine revs there is no sighn of arching even tried another king lead tested diaphram with a foot pump it held a 20psi. when turning up boost or advancing the angle senser theres no pinking either could my AEI unit be knackerd.
