Mike
I had exactly these symptoms with my 93 +8 (also running 14CUX injection) - it turned out to be a faulty (new) injection relay. I worked mine out by buying some NOID lights (£15 from Demon Tweeks, IIRC); these allow you to see whether there is any power getting to the injectors. Apparently it is quite common for these relays to be duff, even straight out of the box.
Good luck with sorting it, and please keep us posted.
Dave
