Put the old valve block on yesterday and gave that a try, then found a leak on 1 of the seals sorted that out and have discovered that 1 of the lower valves is ticking most of the time. Is this right, but the car stays up a lot longer, the compressor is not running all the time now don't know if I have put the presure switch wires the right way round as both are red , so is it just guess work with this or does it not make any difference. The back does drop but after an hour the front was still up this morning, if I try the Schrader valves do I disconnect the EAS unit as I would need the engine running to use my tyre pump, just to try them on the back.