I have a few pink relays lying about, they worth anything? I dropped an efi rst engine in my mk3 so don't need em as I wired my pump and ignition via two yellow relays,
I had a really annoying problem of mine cutting out randomly, thought it was relays but when I looked into it, it was the fuse holder that was the problem, loose connection and over bumps it would knock it loose and cut out.
Just go through each and every connection from pump back to the first connection until you find it, that's what is do and go from there.
Old cars can be a right pain in the bottom lol