Quote:
Originally Posted by wrongmark
Any issues with the MOT emissions test since fitting?
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Had my MOT in Oct no issues at all.
The emulator does not alter the emissions in a bad way, it actually restored the normal operation of the engine ie Statified lean burn, re-generation etc. Even if the NOX cat went bad in the future, the emulator is supposed to mask it and not flag up any F/C's.
Also MOT only measures CO and HC (handled by the normal CAT's upstream), whereas NOX is not in-scope in the emissions test.
There is also another thing you should all look out for during MOT time is when they carry out the fast-idle test your Lambda should be => 2.0 on the DI engines running stratified, whereas normal non-DI is normally around Lambda 1.0. I've actually had a MOT station fail me on this when I first got my car, it's only when I rang BMW HQ who intervened to confirm this was the correct spec for DI engines. They then realised that they entered the wrong 530i engine parameters (pre-DI engine) into their emissions computer...doh