depending how much (if any) they took out of the heads and/or block, it may have changed compression ratio. doubt that, though. I would say that maybe they messed up the ignition timing, but the 4.7 is a COP ignition, it would be way off if they had coils crossed or something.

 

Yea, its strange cuz its not running bad at all either.

Edit:
Now after driving on the freeway CEL came on as well, but when i do the hold in the odomoter while turning key 5 times trick no code comes up, but it does check all the lights & guages.

 

try the keydance. Flip the key on-off 3 times and leave it on, and it should show a P code in the odometer. or have autozone scan for free.

 

Oh so its 3 for the code not 5? ha, i'll do that in the mornin. I'm hoping for a vacuum leak or a sensor after this overhaul that it already had

 

Its a 0455 code for a leak, could this cause the knocking like sound?

Here's a vid of knocking

http://www.youtube.com/watch?v=d5Vbg4UanJM

 

Flex Plate maybe? I unplugged each coil pack one by one & knock never stopped, someone said that was a way to check if it was a connecting rod issue