Looking for an answer. My 6 cylinder gas Bimmer has had an intermittent drivability problem for about 10 years. When happening, the car does not hold the 'idle gas' as I will call it. Everytime I take my foot off the gas, the car will quit. I'm doing 55 mph, take my foot off the gas and it quits. As long as I keep my foot on the gas, AOK.