Phil, engine oil level was ok, if it was diluted would this cause my symptom? also no blackening of the fuel by tandem pump issue.
Keith, the fuel pressure rises from 0 to 60psi and stabilises there after starting when idling (same with new filter) are you suggesting a problem there? Point taken about fuel filter I removed the top and we didnt have one in stock but the bowl looked clean with no swarf etc in the bottom so I refitted top and tested in my haste!
Piotr, corrections at idle from memory only had usual slight variation
Thanks for the replies
Rob