Holger Oun

My problem is that it doesn't have the green plug for post-cat O2 sensor. It only has two black plugs. Also engine block 34,35 doesn't show anything via vagcom. I´m running too rich, at first after resetting, long term was around -7.6 bank 2 idle, -5.5 bank 1 but after idleing for a few hours it has calmed down to around -1.5 ja -2.6, which led me to believe that lambda heaters were bust. I tested the MAF and it had 3.8g/s idle and 130g/s under load, seems fine. I also tested both precat plugs(if those were the right ones) for heater resistance and both were 3.6Ohms. So i'm wondering if someone knows which type of system is used on my car, do i have 4 lambdas or just the precat ones? It's an 97' A6 C5 2.4 V6 121KW ALF, cable throttle variant. And what other stuff should i test, since MAF and precat O2 are the ones responsible for mixture?


A picture of engine bay with missing colorful green post-cat connector, borrowed from the internet.
http://www.upload.ee/image/5319853/jama.jpg