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Re: 1998 saturn SL2 idle speed changes low, high, back to low
The idle is controlled by a solenoid in the throttle body that the ECM uses to vary the opening in the passage, allowing more or less air in depending upon need. When the passage or solenoid get gunked up, the ECM can begin having difficulty controlling the idle.
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99 Rodeo LS 3.5L Stroker V-6, 4wd, 31x10.5x15 2 inch Trooper lift, Aisin manual hubs.
03 GMC Envoy XL SLT 4x4 5.3L V8
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