What to do if there is engine oil in the pipe below the throttle of Audi A4L?
2 Answers
Audi A4L has engine oil in the pipe below the throttle, which is a normal phenomenon, but a large amount of engine oil is abnormal. Too much engine oil will cause waste oil and oil leakage. The detection standard is to pull out the waste gas pipe and wipe it with a clean napkin. No oil stains are the best, a little oil is allowed, and a large amount of oil is a fault. The cleaning method of the throttle is as follows: 1. Prepare tools. A small 10mm wrench (for disassembling and assembling the battery terminal), a large cross screwdriver (for disassembling and assembling the intake elbow), a T30 internal wrench (for disassembling and assembling the throttle), and a bottle of carburetor cleaner. 2. Disassemble the throttle intake elbow. 3. Unplug the throttle wiring harness connector. 4. Disassemble the throttle body. 5. Clean the throttle with cleaner.
I saw you mentioned oil in the pipe below the Audi A4 throttle body, and I've experienced this issue too. When working on my car, I found that it's usually caused by a clogged or damaged PCV system ventilation valve. Oil vapor leaks out and enters the throttle body area. First, you should check the PCV valve to see if it's not functioning or stuck. If there's an issue, replace it with a new one. Then clean the throttle body and related pipes using a specialized cleaner spray, but be careful not to damage electronic components. If you're handy, you can do it yourself, but it requires some patience. If you can't manage it, it's best to find a reliable repair shop for diagnosis. Don't wait too long, as accumulated oil can cause engine stalling or carbon buildup, even affecting fuel consumption and performance. Develop a habit of regularly checking your oil condition and use good-quality oil to prevent many issues. In short, address the problem as soon as you notice it—don't ignore these small issues.
