Hi! juVius has a good point in cleaning the fuse and relay box but how many of us remember to look at the connectors of the fuel pump? Do they look like these you have most certainly problems with starting your car. in my 84-944 the wire connectors looked like this.... dry, corroded and with very little clamping force to the connecting studs in fuel pump. had to clean them with a model file and sand-paper and same treatment to the studs. lots of Vaseline on them and back into pump and no start problem any longer.
Here´s some pictures:
