My turbo wagon had been sitting for two days in my driveway. I hopped in to got to the store, turned the key, it instantly started like it always does, and then died about one second later. Batteries hot, checked fuel pump fuse, refuses to start. Tried three or four times. Turns over but won't fire. Lifted the hood after third try, and heard a humming sound, even though the ignition was off, coming for under the plastic housing where the throttle cable goes. Took off the housing and saw it appeared to be coming from the constant idle speed motor, or whatever is cylindrical, about four inches long and an inch and a half in diameter. But as I stood there feeling the vibration and humming noise coming from it, it quit. Nothing. Disconnected the throttle valve connection and looked at the flat pins to see if any were corroded, and they weren't. Tried to start it again. Still a no-go. Desperately need to know where to look. I live out in the country and am miles and miles from a Volvo dealer. Is there an in-line fuse somewhere outside the regular fuse box I should be checking? Whatever could the cause be? Dick