Code 66 is gone. It has not showed back up the last few times I pulled codes.
I plugged the hose fitting on the filler neck and it did build up some pressure. I have since then tie wrapped a price of cloth over it and it has not gotten oiled.
Pcv was replaced with the new heads and intake. I pulled the pcv and it’s hoses off to check for excessive oil and there was none.
As far as excessive blow by, there was no oil on the previous throttle blade or laying in the explorer intake.
I am petty sure that the small cone air filter was able to handle the airflow of the explorer heads and intake but can’t handle the new afr heads and performer intake and 70mm throttle body.
The existing air filter is a cone type that’s 4 1/2 inch round at the base and 3 1/2 at the top. It is 4 1/2 inch tall. It came with the sve cold air kit.