Porsche Enthusiasts Club Forum

Still having fun starting my car when hot. If I have multiple 10 min journeys in the space of an hour it gradually gets harder and harder to start. I have tested the fuel pressure today and with the relay jumpered it is 3.4 bar. As soon as I stop the relay it goes straight to 3.3 bar. After half an hr it is 3 bar. Looking at the clark's garage site it says it should be 3.8 bar when the realy is jumpered and a drop to 2 bar after 20 mins is OK.
Any ideas? I have changed the check valve, but now Im thinking fuel filter or pump. Cheers