Pontiac Montana won't start

[grandamle91]

I know its not a Grand Prix but same platform.

 

It's a 2003 Pontiac Montana 3.4

I did a top rebuild on it because one valve stuck and blew up the rocker arm.

I was having trouble getting it to fire chased that down to the rear cps wire being damaged. Now it fires but sounds weak and when the pcm should take over it doesn't seem to.

 

Here's a YouTube video

http://youtu.be/4jPtR9uWpzo