CHECK ENGINE LIGHT IS ON

[jfoj]

Most common cause is likely a cracked lower intake boot, but there are plenty of vacuum leak problem areas on these engines. Also be prepared to replace the CCV and hoses as well.

Smoke test is the quickest and easiest way to find the problem(s). Make sure you check both the intake and crankcase. Remove the oil fill cap and let the crankcase fill with smoke then put the cap back on.

See this video below, cheap fluid transfer pump under $10 at most auto parts stores, a few rubber gloves, rubber bands and cheap cigars.

https://www.youtube.com/watch?v=AsgB9eBl58I