You can change the style the forum displays by selecting your preferred style at the bottom left of the site.
We have made an enhancement so that old threads should now link from search results to the correct thread. This is not yet in place for single post links
The turbo seems to be leak free for now Oil return flows free and there is no excessive crankcase pressure. It seems that the oil change cured my leaking issues.
What kind of cat do you have, originals or aftermarket? How are the exhaust manifold flanges, any signs of leaks? Everything tightened up as they should be? Even a small leak on the exhaust side before the lambda probe can cause problems with emissions. Twin tip exhaust pipes can cause problems unless you block the pipe without the MOT probe.
No fault codes of any sensors? Air temp, water temp, knock sensors, engine feel healthy when driving? Do you have a wideband lamdba gauge?
Although I don't have this engine, I thought that a) you may have too much fuel at idle; b) the ISV is trying to correct, but is (intermittently?) maxed out; and c) these three things (common between a 7A and your motor) done in the order below, might be easy enough to check first:
- Try a code clear and pull again to confirm presence now. Is the code you got before this one?:
2231 (Blink Fault Code), 00533 VAG1551/2 Fault Code Number
Idle Speed Control Valve (N71)
Idle speed adaptation maximum limit exceeded or Minimum adaptation limit not reached
Sticky or binding ISV, Mass Air Flow Meter (G70) offset, additional air introduced between G70 and N71
Symptom: Idle speed too low, or too high, Add air leak.
How is the idle speed, fast, slow, smooth?
- Do a check of engine vacuum as delivered to the FPR at warm idle (see info at Dave's links going back);
Although I don't have this engine, I thought that a) you may have too much fuel at idle; b) the ISV is trying to correct, but is (intermittently?) maxed out; and c) these three things (common between a 7A and your motor) done in the order below, might be easy enough to check first:
- Try a code clear and pull again to confirm presence now. Is the code you got before this one?:
2231 (Blink Fault Code), 00533 VAG1551/2 Fault Code Number
Idle Speed Control Valve (N71)
Idle speed adaptation maximum limit exceeded or Minimum adaptation limit not reached
Sticky or binding ISV, Mass Air Flow Meter (G70) offset, additional air introduced between G70 and N71
Symptom: Idle speed too low, or too high, Add air leak.
How is the idle speed, fast, slow, smooth?
- Do a check of engine vacuum as delivered to the FPR at warm idle (see info at Dave's links going back);
- Could the ISV, MAF and connectors use a clean? Are your injectors all closing properly and not leaking while under pressure?
I cleared the idle speed adaptation code a few days ago and it seems to be gone for now.
To me the idle seems smooth, around 750 rpm when warm.
The vacuum to the FPR has to be tested.
MAF and its connectors were cleaned last summer.
About the injectors, I can't say for sure. If replacing the catalyst does not solve the problem my next step is to take the injectors out for a checkup.
I got a sports cat installed 200 cell. Only i had the car mapped with a different ecu and i can switch maps. I have an eco map which helps me get through MOTs
We process personal data about users of our site, through the use of cookies and other technologies, to deliver our services, personalize advertising, and to analyze site activity. We may share certain information about our users with our advertising and analytics partners. For additional details, refer to our Privacy Policy.
By clicking "I AGREE" below, you agree to our Privacy Policy and our personal data processing and cookie practices as described therein. You also acknowledge that this forum may be hosted outside your country and you consent to the collection, storage, and processing of your data in the country where this forum is hosted.
Oil return flows free and there is no excessive crankcase pressure. It seems that the oil change cured my leaking issues.
Comment