Catch Can N/A VQ37VHR Burning Oil/Smoke

ByThaBay · 11-12-2021, 12:58 PM

Quote:

Originally Posted by Jonathan-NEX

Hey I know this is an old post, but I am having the same issue with my set up. i installed the catch can the same way you did, and I forgot to open the backside valve covers causing pressure to build up and the same thing would happen when I would open the oil dipstick. I proceeded to add hoses with little filter breathers attached at the end, and that got rid of the oil pressure problem, but then I received a code P0171, running lean on bank 1, what do you think I may be doing wrong?

Here are pictures of my current set up

You're pulling in unmetered air through the breathers. Your fresh air intake has to be taken AFTER the maf sensor meters the air. If you take in air from a breather, that's "unmetered" air going directly into the manifold.

breather -> valve cover -> pcv valve -> intake manifold = vacuum leak

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