I'd still recheck/reconnect the instrument cluster, make sure all the connectors are installed properly. There was one connector that had a "lever-type" locking mechanism that I thought I had latched correctly but I had not installed it correctly. As I recall the cluster powered up but the car would not start - reinstalling the cluster solved the problem.

The IP is primed by cranking the engine, there is no hand pump used for priming. Of course if you did not disturb the fuel system you should not have to re-prime it. The low pressure fuel pump is still mechanical. The intake manifold is easily removed and really opens up access to the pump/fuel lines and glowplugs if further troubleshooting is required.