Quote:
Originally Posted by Enabled
Has the car been remapped or any other modifications?
In ISTA, on the module map, click on the engine ecu (labeled DME sometimes, or DDE) and click call up ecu functions on bottom left. The use the tabs to bring up the diagnosis request, and log the various sensors you need.
The oxygen sensor is mostly used for emissions, it will not up-regulate fueling. Mass airflow sensor is used much more.
|
No - no remaps at all; car is stock.
When I am reading all the sensors in ISTA, and no matter what I do (in terms of drive cycles etc), the pre-cat Oxygen Sensor is always 'not available'. I realise it's not a major issue, but was wondering whether this would affect the 'mean quantity adaptation' for the injectors (where the car calibrates the average fuelling over all cylinders periodically). As I understand, this is based on Lambda readings from the oxygen sensors, but it's of course not realtime in the same way a petrol engine's fuelling is adjusted. Many thanks.