Servus The Audi 80 2.0E built in 1992 with 115hp from my dad did not get through the AU again. I found similar problems about the search/Google but no solution. At first at increased speed CO 9.54 (should be 0.30) and Lambda 0.754 (should be 0.979 to 1.030) and at idle CO9.83 (should be 0.50). The 3rd candle was wet and after the exchange the car ran even quieter. Lambda probe I measured (no passage without ignition and about 450mV at ignition) Now everything fits with increased only the CO is still at 9.51 at idle run. What can this be about? The distributor cap + fingers did not see well (deep grooves in the cap, worn end of the finger) Would that affect the CO? Best greetings, Andre