Audi 2.0L: How to Tell if the Problem Is the PCV Membrane and Not the Breather Hoses
Audi 2.0L crankcase ventilation issues often produce very similar symptoms. Audi 2.0 PCV rough idle. A whistle or hiss. Vacuum leak vibes. Maybe a check engine light. At that point,...
Audi 2.0 FSI Rough Idle: Is the Valve Cover or the PCV System Causing It?
Audi 2.0 FSI rough idle PCV is one of those problems that makes you stare at the tachometer and go “wait, is it supposed to do that?” Sometimes the idle...
Audi 1.5 TSI: When to Replace the PCV Membrane and the First Signs of Failure
A tiny diaphragm can cause a lot of noise and not-so-tiny problems. On the Audi 1.5 TSI, the PCV membrane helps control crankcase pressure, keeps idle stable, and manages oil...
Common PCV Failures on Audi 1.4L and 1.6L: Why a Whistling Noise Starts Under the Cover
A thin whistle from under the cover is a common problem with Audi 1.4L and 1.6L engines. No driver can ignore it for so long: it’s annoying, intermittent, and a...
Audi 1.4T, 1.8T, and 2.0T: Symptoms of a Bad Valve Cover Membrane
There are three key signs that something is wrong: a whistle, an unstable idle, and an oil film. Unfortunately, these are the most common Audi valve cover membrane symptoms. This...
Audi 2.0 TSI Lean Mixture Codes: How to Check if the PCV Membrane Is the Problem
Lean codes can be frustrating because the car feels like it’s “not getting fuel.” But the real issue may be extra air through the Audi 2.0 TSI lean mixture PCV...
Audi 2.0 TFSI Burning Oil: When the Oil Separator Is the Problem, Not the Turbo
Blue smoke and a low oil level make drivers blame the turbo right away. Fair choice. But for the Audi 2.0 TFSI turbo, oil consumption can also come from crankcase...
Why the Audi 1.8 TFSI Develops a PCV Vacuum Leak and How to Spot the Symptoms
Noticed that your Audi runs lean, stumbles at idle, or triggers the check engine light that looks “air leak-ish”? This usually indicates typical Audi PCV membrane failure symptoms. This is...
Common PCV Valve Issues on the Audi 1.8 / 2.0 TSI TFSI: Whistling Noise, Rough Idling, Oil Consumption
PCV problems on Audi 1.8/2.0 start very small, but show up where you feel it first: at idle, whistling, oil use creeping up, and so on. All you need to...