Concepts of how BMW twin turbocharged N54 engine operates: The control side of the turbos, possible failure points, methods to diagnose and isolate these failures, and how to repair/fix such findings.
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What is causing the misfire and the steps we're going to take to fix the problem. https://youtu.be/QHRqLWahCrk
When is a vacuum leak not a vacuum leak?
When it’s hiding in the EVAP system of a Porsche Cayenne.
A P0455 code points to an EVAP problem, but the EVAP system checks out OK with our smoke tester. And the purge valve checks out as well. So where could the problem lie?
Our derFix Super Sleuths unravel the mystery.