AndyF,
I've just recently got a 1991 Sportline back on the road after 2 1/2 yrs sitting (rotting) in my work car park. It has K-tronic fuel injection (braided fuel hoses) and the fuel pump should buzz briefly when you turn the key to live just before contact. Whilst the engine is running, the pump runs continuously and any excess fuel goes back to the fuel tank. If you have the same system, I'll happily photograph my relays and send you a pic. Fuel pump relay should have 'fuel pump' embossed on it. Failing that I can give you the VW part number?
I changed fuel filter, air filter, oil and filter, plugs cam belt & tensioner, coolant, adjusted dizzy timing, Brake hoses and new fluid, and most recently unblocked drain holes in bulkhead (slight flooding problem). Car runs sweet as, I really am enjoying it more and more. LH roof handle broke off last friday - that's 95 pounds of squid for a new one from VW (ouch). Tyres have flat spots and vibrate over 70, but I 've had a ton out of her without sweating.
Best of luck
Goodo