Engine shuts off after three seconds after rebuild

So, I just finished putting my engine back together.
Here is what I have replaced:

Pistons.
Piston rings.
Rod bearings.
Main bearings.
Thrust bearings.
Head gasket.
Valves.
Timing belt.
Tension-er pulley.
VVT solenoid.
Starter motor.
Fuel filter.

Last night after I finally got it back together and tried to start it up. It runs for maybe three seconds with loud random squeaking and then just shuts off. It almost sounds like the piston rings get stuck or something. I know the timing was all lined up before I started it up. Any suggestions of possible issues? Thanks