Engine sometimes stalls (dies) when engine rev's down during normal driving (e.g. when turning or stopping for a stop light). Generally engine rpm's seem to fall too quickly. Idle is usually normal. Throttle position sensor checks out OK. Any suggestions? George SImmons '94 S4 - 20k mils '91 200TQ 20V - 75k miles '86 5KCSQ - 150k miles