Martin, My suggestion would be to check the fuel return lines going back to the tank. Then if these are ok, then check the primairy pressure regulator in the fuel distributor. The primary pressure regulator in the fuel distributor may be shimed to tight. Sounds like the CPR may be working ok, be sure to check the electrical connections.Something is retaining the restricting pressure on the control plunger. There is a small decoupling restriction bore that may be stopped up in the fuel distributor. Have you run any fuel cleaner thru the car. John Hervey http://www.specialtauto.com/ << On Saturday, we got around to attempting to start #2727 for the first time. Knowing there was something up with the CPR I took it apart. It was completely clean inside. I blew through both ports with the shop air-hose and if there was a blockage, it's gone now! (I could feel air passing through). I also undid those four small flat-head screws and removed and cleaned the components underneath. (two little plates and a funny little cap in between). I then reassembled everything. As soon as the pump got petrol into the CPR, the air flow sensor went really stiff again. I have no idea how this device works, but if anyone has any hard-and-fast solution for this apparent blockage, please let us know! >>