I'm trying to sort out an issue on our 1991 Volvo 940 Wagon (16V, non-turbo) which we've had for about 6 years now - it cranks over, but won't start. So far, I have pulled both fuel pumps and confirmed that they work, also that they are pumping when the engine is cranking. I cleaned the distributor and rotor (again, they were just replaced a month ago) and installed new plugs. Based on the trouble code being set, I also replaced the Crank Position Sensor - there were signs of fraying of the cable at the old sensor.

Within the last 20k miles, the plugs, wires, distributor, rotor, wires and ignition module were all replaced - this was done in an effort to cure a stumbling problem (which was successfully resolved back then) - but now I have the mother-of-all-stumbles...in that it won't even start.

I've reviewed the FAQs and forum, too - I do almost all my own vehicle maintenace. Thoughts on what to check next? Thanks for any assistance.