Misfire code?

Also the only code is a misfire on cyl 5. No smoke when u first start it and the plug was not wet so i doubt a leaking injector

Some videos. Drove it in front of my home after deleting the code and it drove nice and strong. It randomly does it sometimes after 3-4 minutes sometimes 30 seconds after start

You have found the problem, when you release the oil cap, the vacuum is too high, this is because the check valve for the Positive Crankcase Ventilation system is blown. This will cause the misfire codes. Here is the part you need to replace to fix the issue.

And I am guessing there are 2 of them?

Yep, one for each cylinder bank.

Thanks

Np, let me know how it goes.

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I started the car after replacing both sides and there was a misfire on 4 or 5 cylinders so i thought ill delete them it may take a sec for everything to settle, it did for 2 minutes and was fine, so i turned it off and put back everything and tightened all. Started it this am and lwft it 15 minutes all great. So i took it out for a drive and it did the same thing same cylinders 3 and 5, deleted them while driving and it drove excellent, half a mile down the road did the same thing. So not sure what else

The codes were 3, 5. Decided to delete them and give it more drive, and stepped on try e gas hard in case injectors are plugged with carbon after a couple of those got this code

This

These engine have an internal crankcase vapor control diaphragm at the front of the engine that sounds like it is blown. This will create the vacuum inside the engine like you have.

Can you share its location plz

They don't show it on AllData but I believe it is near the front timing chain.

kept it running 20 minutes till fully warm, then once you rev it the motor to 2500 rpm it misfires, same codes, cyl 3 and 5. No those v8 engines only have those PCV, the ones on front of engine on valve covers are usually on the inline 6 engines

Hmm,, that vacuum when you remove the oil fill cap is the issue. We need to figure out where it is coming from.