[Update Sep 2019]
turns out there was a wiring link missing on the supply to the resistor block
was never there, now car runs better than it ever has in 2 years had a mate looking her over, he says "hey you've not got that jumper #5" makeshift Jumper, which I'll probably never upgrade
[Update Aug 2019]
Had the second hand Res Block fail while driving to Palmy Meet
Have replaced with a brand new unit
Now car only runs for 3 or 4 seconds then dies
Appears Electrical ie not fuel related
Has anyone experianced something like this & got any tips