My v8 4,2 -92 had this oscillations so I changed the lambda and now it runs steady. But the gas consuming is oscillating plus/minus 10-20% with an frequens of aboute one minute or less. Found on the web that the fuel pressure regulator could do something like that too. Annyone having experience of that ?
In Sweden the lambada sond by audi dealer is about 1600SEK , makes about 150 euro.
