How do you set valve timing

Slacken off, but do not remove, the (three) screws which secure the timing gear pulley to the variable valve timing (VVT) unit.
Press the variable valve timing (VVT) unit/timing gear pulley on the camshaft.
Install the center screw which secures the variable valve timing (VVT) unit to the camshaft and tighten slightly.
Turn the variable valve timing (VVT) unit anti-clockwise as far as it will go.
Remove the center screw.
Position the upper timing cover.
Turn the timing gear pulley clockwise until the screws at the oval holes are in the limit position.
Continue turning clockwise until the timing gear pulley marking is 1 1/2 Cog before the marking on the upper timing cover.

Note: Do not turn anti-clockwise during this procedure!

Check that the timing gear pulley is still in the limit position in the oval holes.
Tighten the center screw in the variable valve timing (VVT) unit to 120 Nm (88 ft. lbs.) .
Check that the variable valve timing (VVT) unit does not rotate when tightening.
Install and tighten the center plug to 35 Nm (26 ft. lbs.) .
Turn the variable valve timing (VVT) unit clockwise to the limit position.
Turn the timing gear pulley so that the markings correspond.

I have lined both camshaft factory marks with the upper cover marks as indicated. The crankshaft pulley mark is lined up with the factory mark that is on the bottom front of engine. When l crank the engine over the front variable camshaft gets loose and it will not spin from taking the cam censor off to view the variable camshaft is turning. What is interfering with the front variable cam from turning?

Likely a clogged/faulty intake camshaft solenoid valve.

If light came on after the belt change that you could be off a tooth or two. Recheck that timing marks line up.