Query on increased O2 levels in exhaust gas Please refer to the O2 values ascertained during PUC checks of my K series Estilo for the past four years. The sudden spurt in O2 levels strikes me as odd.
1. Do I need to check the sensors for any faults?
2. The fuel filter is due for replacement. Would changing this bring back the O2 levels?
3. Is my engine is running lean?
4. Is the current O2 level in excess of normal values?
I randomly checked the O2 levels of similar vintage petrol vehicles and most of them hover between 4-15 PPM: mostly towards the higher end.
My car is near the 80k mark and is running fine. The fuel efficiency and pickup seem to have reduced a bit, but those could be the effects of clutch wear (still original). But of late, I seem to feel that the engine bay gets hotter - this is just a feeling and not based on empirical observation. |