Since I own a 156 MY edition with "Euro 3 Homologation" which means I have 3 Lambda Sensors (2, each at the Junction of Cyl 1,2 and 3,4) and one before the Cat.
My question is: When does the computer start to take in readings from the first two Lambda Sensors ? Normally the car will run on tablevalues until warm, but the movement of Lamba Sensors closer to the engine is designed to do proper regulation on earlier state on cold engines.
Anyone knows this ?
Thing is that the engine is running coarse on the idle, but only when cold and I have changed:
2. Spark Plugs
3. One defect Ign. Coil.
3. Intake valve housing.
4. Cleaned and Checked every hose from the filter to the intake valve.