So I replaced my PCV with a new one. I didn't have any codes but I've been dealing with oil leaks, the main one remaining now is the rear main. Swapped the PCV and now the engine acts weird when coming off the throttle. I have a manual so imagine driving along, coming to a stop pop it to neutral and then at that point the revs drop to where they should be, around 800 and start to climb. Sometimes they will start to climb to 1600 or so and as soon as I come to a full stop they drop to like 1200, hang there for a sec and drop to 800. The car thrown a CEL so I will scan it but anyone have any ideas just based on that?