Quote:
Originally Posted by vagthomas
MAF Sensor is perfect and clean. There are no any leakages anywhere.
The car runs much more smoothly. I cannot be more clear on that.
On the other hand, if MAF or O2 sensor have problem, how could all
measurements be verified with external O2 sensor?
ECUTEK manual is very detailed. I have read it all! All that you need for
our engine is there! A good engineer with both good theoretical and
practical background (I am a mechanical Engineer myself) can do many
things on this engine. And we did!
Personally, the almost 1 kg of kilo within all RPM band is obvious and I feel it as another car while is more economic by 0.1-0.2 lt/100 km.
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Tail pipe o2 sensors will read a bit different to the o2 sensor right near the exhaust ports. It will be further "off" due to exhaust passing through catalytic converters. in general tail pipe will read leaner than an o2 sensor at exhaust ports, can be a considerable difference 0.5 or more afr.
all the tunes from 2012-2016 are pretty well the same for any countly and auto/manual (for power).
take a look at the MAF scaling from your original stock rom and from the tuned roms.
If you find big descrepencies in those scales with stock intake components then you likely have a maf sensor that's "off" or outside the normal tolerance band.
Ive seen some 8% or so off but never 20% like you found seems quite odd.
If you have compensated for a maf sensor issue with large cange to maf scaling you will see same afr.