1997 Geo Metro no compression while turning over

Just rebuilt the block piston rings rods mains seals everything new head for my 1997 geo metro and when I first start it it runs for 10 seconds then dies and when I try to start it right after that it turns over but no compression. Before I thought it was the hydraulic lifters but pulled them apart cleaned them and put back together still does it. It is the same sound as if you had your spark plugs out and turned your motor over. But my plugs are in. It did this before I pulled the motor out and redid it. But before it was a different head and the crank and piston rod #1 were torn up. I sent them in and had the crank welded and the rod ground. Assembled the motor put it in and still the same problem as before? It makes me think it may be a sensor or something it has been driving me crazy. I have asked many many people and still noone has seen anything like this. Anyone have any ideas?