GM Bonneville/Eighty Eight/LeSabre 1986-1999

Idle Speed and Mixture Adjustments


All engines' idle speed and mixture is electronically controlled by the computerized fuel injection system. Adjustment are neither necessary nor possible. All threaded throttle stop adjusters are factory set and capped to discourage any tampering; in some areas, tampering is illegal. In most cases, proper diagnosis and parts replacement will straighten out any problems concerning this subject.