Thanks Peter. Any spares I can borrow will be usefull. I have already replaced the hp pump and filter and it's starting to become an expensive problem....
I have another theory. The fuelling arrangement as suggested by the manufacturer of my swirl pot is a bit odd in that the low pressure overflow from the swirl pot is teed into the hp return from the fuel pressure regulator. This means the same fuel could be recirculating through the hp circuit via the swirl pot. At idle when you are not using much fuel it could mean that the fuel is overheating. So this week I am going to try a one way valve in the lp circuit ensuring that once fuel has been through the hp pump once it returns to the tank.
Updates to follow!
Cheers Robin
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