Code p0300 P0300 2003 Chevy Silverado

[Amber29.as]

Please help me I'm a clueless girl ....Replaced my knock sencers and spark plugs and wires and that gasket that goes on the manifold now it's running very rough and throwing code p0300. 

Edited April 19, 2021 by Amber29.as
Added to my post

[CamGTP]

Best thing to do is to re-check all your work. Make sure there are no vacuum leaks on the intake gaskets. Double check all the connections at the coils and spark plugs. You may even need to remove the plugs to make sure some of them aren't cracked.

[Amber29.as]

So the guy who put the spark plugs in didn't put those little metal tubes that are heat shields back in is that bad

[Amber29.as]

Also the pics of my freeze frame data is it reading right or is some of those readings bad

[CamGTP]

The heat shield things don't matter, I throw them in the garbage more often than not because they rust away or break when yanking them here in Minnesota. Never had a single issue.

 

The freeze frame data doesn't really help in this situation because we would need to watch live data of each cylinder to determine what cylinders aren't firing and giving off the P0300 code.