1996 Chevy Truck no start

I have a 1996 5.0l truck and ive replaced the upper and lower intake gasket set and replaced the injectors. And now it wont start. First. I set the motor at tdc with rotor poiting at the 8 on the distributer housing and it points at the #1 cylinder, and hermonic balancer marks are lined up. I have great fuel pressure and compression is great on all cylinders. Spark is hitting hard out of coil but is weak out of plug wires. Have replaced cap, rotor, wires, plugs. And cam sensor. Ohms through wires r good. Theres no visable problems on cap or rotor. Truck ran when droped off before work was preformed. Have check wireing volts to all sensors crank, cam, ect no wiring problem. It does act like wants to for abouut 3 rotations then wants to vapor lock due to not firing the fuel.