Well we still don't know what is wrong with my car. We tried a "purge valve" because they can have a slow leak and its hard to find, that did not change anything. We tried a O2 sensor, that did not work either. The only vacuum leak we found was the transmission vacuum modulator, which we will replace tomorrow. But when we blocked the line it did not change any readings on the O2 sensor. After a couple of days of driving I am still getting a code 35 (lean). The manifold does sound like it has a air leak but no starting fluid has found it if its leaking. It feels like its getting worse because if your in a parking lot and you hit the gas and then the brake it feels like it wants to stall then the idle jumps back up. The fuel pres. regulator was checked and no problem was found, so what is wrong with this car?

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Mike

90 300D 511k
95 C280 133k
14 BMW 528i