Hey 924 - Once you had the cam and crank shaft timing marks corrected have you had the time for a compression check ? Just make sure to have the throttle plate held wide open during the test. I like to write down not only the 1st compression stroke reading but also the final (highest) reading on the gauge for a more complete cylinder performance comparison.
Many feel when troubleshooting a "No-Start 928", it is best to initially jumper the socket legs of the removed ignition and fuel injection power relays to help eliminate any potentially questionable relay.
Also - all the other owners were correct about spraying starter fluid through the LH "Hot Wire" air intake. I should have mentioned to only spray a light whiff into the plenum port used for the power brake connection.
Please keep us posted - Michael
