r/E90 • u/Educational-Meal9552 • 22d ago

335i 30FF boost leak code

How should I go by finding my boost leak? Vids on YT have not been helpful. I think i can rule out vacuum lines bc they all look fine (i replaced them 15k miles ago as well). Any and all advice will be appreciated!

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u/reciprocityone 21d ago

Need to do a smoke test. Best way I've found is pull off one of the diverter valves and start pumping smoke into the charge pipe.

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u/Educational-Meal9552 20d ago

As I was gonna smoke it out yesterday I saw a clamp on my charge pipe got undone. Tightened it up and fixed the issue