Problem solved!

I've installed a Walbro 255 and added a filter between the tank solenoid and the pump so the pump is protected. Bit of a delay as M10x1 to 5/16 barb adaptors are hard to find.

I've got a bit more electrical cleanup to do and then I'm good.

Many thanks to all

The relay was dropping 2V across the contacts, checked with a multimeter across it's contacts, it's only a few bucks so I replaced it. I am getting the priming voltage for a fews secs as measured at the ECU. I think my earlier result was incorrect as I was measuring at the pump or I just cocked it u...

ECU Fuel pump relay signal from A1 is good. I had a bad relay that was dropping 2V. As oldn64 pointed out jags are not the easiest to fault find electrically, I'm finding multiple issues - I'm not seeing voltage at the pump but I may have introduced a fault as when I apply 12V to the pump it just ge...

Thanks guys, The relay gets 12V for less than a sec, the pump doesn't have time to prime. I turned it over till the oil light went out and the pump didn't run I'll pull the ECU tomorrow and see if it smells brown etc I'll also check if the voltage on the relay trigger is actually just floating or if...

I have an older conversion, VN 304 with 808 into a 1973 Jag. This has worked for over 20 years but now I'm not getting voltage on the fuel pump relay. The ECU is getting voltage.
Do I have a dead ECU and if so where is the best place to get another?