Idle Speed & Ignition Timing
WARNING: This page is about a different car, the 2003 Saturn Ion 3, 2003 Saturn Ion 2, and 2003 Saturn Ion 1. However, it is still accessible from the selected car via links, so may be relevant.
Idle mixture is controlled by Engine Control Module (ECM). Idle speed is preset by manufacturer and is not adjustable. Vehicle is equipped with an electronic computer-controlled ignition system. Timing is not adjustable. For operation, specifications and adjustments, see THEORY & OPERATION - 2.2L ION , SERVICE & ADJUSTMENT SPECIFICATIONS - ION & SATURN "L" SERIES and ON-VEHICLE ADJUSTMENTS - CARS articles.