95 volvo 940 turbo has had intermittent starting

95 volvo 940 turbo has had intermittent starting issue. Replaced crank position sensor and cleaned idle air control valve and problem mostly solved, but has now (6 weeks later) same problem but worse. Won't start at all, but if I hold gas pedal part way down it tries to start but acts flooded and won't quite start. Replaced IAC with junkyard part which tested ok, but no change. Plugs, cap & rotor & wires seem ok. Using small amount of stater fluid does not seem to help. Tried to test fuel pressure but test port is located such that I can't hook up my tester. Ideas?