I haven't done much with the V8 so can only offer generalities.

Electronic fuel injection has a vacuum referenced fuel pressure regulator at the end of fuel rail. ( fuel and a wire running to each injector )

I _think_ you car has CIS, in that case the fuel distributor is what controls fuel. ( thin steel tube running to each injector , no wire )

This car probably has 2 distributor caps , check the caps for carbon tracking, measure resistance of plug wires, pull plugs look for a bad one.