Clean the ISV. Shayne Bay Area, CA Eastern WA State PARTING: 1972 Mercedes Benz 280 SE 4.5 PARTING: 1986 Audi 4000 CS quattro > Can't attribute any problems to it. Intermittent lift-throttle miss a while > ago was cured with an O2 sensor, and just recently I'm having idle speed > issues (intermittently hangs high, resets when turning engine off).