Engine Surging idle issues

General karthief said:

That depends on how/why the smoke got in there
didn't plug off the tb to oil fill tube: yes smoke will enter the crankcase-normal
Intake manifold gasket leaking: yes smoke can enter the crankcase-not normal

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But wouldn’t smoke enter the heads anyway regardless of the oil fill tube since the smoke goes through the manifold through the lower intake into the heads? Or am I missing something

And wouldn’t I have coolant leaks if that gasket was bad

General karthief said:

The only connections between the crankcase and the intake trac is the PVC and the tube between the oil fill and throttle body
coolant leaks, sometimes but mostly no.

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Sounds good so I’ll try another smoke test and this time I’ll plug that tube. I did a koeo test and everything came back normal and then I did a koer test and everything came back normal aside from the codes 94/44 that I get but from what I’ve read as long as you don’t have the stock h pipe with cats you don’t have to worry about this code? I have catless long tubes so I think I’m good. I also did a cylinder balance test for the first time and it came back normal. Do you know if it’s normal for the egr to leak a little smoke during a smoke test? I’ve had two in a row leak smoke and I’ve seen lots of others in forums go through the same thing where they replace their egrs and the new ones leak the same.