I replaced my pvc valve in Hope's it would help my engine run a little smoother but when I turned it on and white smoke was pouring out from the exhaust immediately, it's the first time its done it that bad, the other time I had just replaced the spark plugs but it quit, the smoke smells like straight gasoline, and theres oil coming from the front 2 spark plugs on the passenger side, it's a 4 cylinder but not sure on the liters, the coolant doesnt bubble at all so I dont think it's a head gasket

 

Welcome to the forum

What YEAR Ranger?

We can tell you what 4cly engine is has, unless its a 2001, then there were 2 different 4cyls that one year

White smoke IS coolant in a cylinder, so head gasket or cracked head
No relation to PCV Valve

Its good rad cap opening is not bubbling but not really definitive
leave the cap off and let engine run for 2 or 3 minutes to see if its starts to overflow, it shouldn't