Do me a favor. Remove the oil cap and start the engine. Check to see how much pressure is blowing out. If it is excessive, you may have either a plugged PCV system or the piston rings may be worn enough to cause excessive crankcase pressure.
I attached a pic below and highlighted where the PCV hose will attach to the valve cover (where the oil cap is located). Start the engine and remove the hose from the valve cover and see if there is a vacuum being produced in that hose. That hose will go to the intake, so there should be a strong vacuum when the engine is running. Also, it may even cause the engine to stall. At a minimum, it will run rough and change the idle speed.
If there isn't, turn the engine off and remove the hose and inspect it for being plugged. Also, check the valve cover to make sure it isn't plugged as well.
Let me know what you find.
Saturday, March 27th, 2021 AT 10:36 PM