My check engine light came up right after I had to brake quickly in traffic and I did not push the clutch in fast enough and the engine stumble (did not stall though).<p>I had 1/4 tank of gas (87 octane with octane booster ... put 87 in by mistake). The car runs fine, and I can't feel anything wrong with it.<p>I have an appt with Star Audi in Rockland, NY on Friday. Anyone have any dealings with them?

cd