Engine quits running when you remove oil filler cap

Normal, maybe. Since they started putting the engine case vacuum in the air filter plenum. Yes it happens. Many different cars today will shut down soon if the oil cap is not on. It has to do with the Mass air flow sensor.

Well -doing that sort of takes out the PCV System
doesn't it

Unmetered air comes in the oil fill hole & gets drawn into
the intake & leans out the fuel mix

You also got PCV system issues with high vacuum

there will be,if it shoots the cap off while you are unscrewing it then you might have an issue,but oil will come out with car running and cap off

engine full of gunk and muck ,needs a good flush out and then change oil every 6000miles with a filter every third oil change

no just takes about 1 hour you need to get a tranny filter and 6 quarts tranny fluid and a drain pan then you have 12 bolts holdin the pan in {trick if you only loosen 3 lower bolts you can control the flow of where oil comes out} then you take out old filter spray all bottom there with carb cleaner to clean out the gunk and scrape old gasket off then put in new filter and new gasket and put bolts back in then fill her up and your done you do need get a new gasket tooooo

The engine breather pipe seems to be blocked.
It may also damage the oil seals.

The pcv control unit is bad. Its a big black plastic unit under the intake.

Make sure the pcv valve is working correctly and allowing the engine to breath

Replace the oil filter after draining the old oil, and" BEFORE "adding new fresh oil, otherwise you'll be dump all that fresh oil, on the ground,while you "TRY to get the new filter installed.

Step 1 Remove drain plug,Drain oil into drain pan
Step 2 Remove oil filter
Step 3 Reinstall drain plug,qnce oil has drained.
Step 4 Fill new filter with oil,lube seal on filter.
Step 5 Install new filter, Add fresh oil to proper level.replace filler cap
Step 6 Run engine check for leaks.
Happy motoring!