Engine Performance problem
2002 Buick Lesabre 6 cyl Front Wheel Drive Automatic 92,000 miles
2002 Buick LeSabre 3800, mileage 92,000. Car recently started idling fast (ie.1800-2000) rpm vs. 800 normal. I cleaned all sensors and throttle body chamber. I replaced "IAC with new valve unit. It still idles fast (abt. 2000 rpm). It resets to normal by turning car off and restarting, but then slowly goes up to about 2000 rpm. No hard fault is stored in computer.
Which sensor or whatever, would likely cause this problem?
have the same problem?
Sunday, September 21st, 2008 AT 12:05 PM