Thanks for all the replies, sorry I haven't replied to the thread sooner, hopefully this weekend I'll find this gremlin, I plan on taking the fuel pump loom out as it's a new one from ebay and doing some checks to see if relays etc are working, and then checking if the wire that connects to the ecu fuel pump feed on the fuel pump loom is running a permanent live or negative as I think it may be wired incorrectly, failing that I can only see it being an ecu fault, as the engine loom was newly made by Ahmed bayjoo and all labelled and I've double checked and that's all connected up and working fine as the Amal valve clicks as should