LEMON Manuals: Even more car manuals for everyone
Home >> Saturn >> 1993 >> SC1 Automatic >> Repair and Diagnosis >> Engine Performance >> Engine Controls - Adjustments - 4-CYL >> Idle Speed & Mixture >> Idle Speed - 2.3L

Idle Speed - 2.3L

NOTE: Idle speed is controlled by ECM and is not adjustable. Slight fluctuations in idle speed are considered normal. Start and run engine for at least 7 minutes to re-establish ECM control of idle.
NOTE: Incorrect idle speeds are normally caused by dirty throttle plate or vacuum leaks. Ensure all vacuum components are functioning properly.
  1. Idle speed is ECM controlled. Resetting of IAC valve pintle is only adjustment that can be performed. To reset IAC valve pintle position, turn ignition switch on (engine off).
  2. Using a jumper, ground ALDL diagnostic test connector for 5 seconds. Remove jumper from ALDL diagnostic test connector. Turn ignition off for 10 seconds. Start engine, and check for proper idle operation. Refer to underhood emissions label for idle specifications. Clear any trouble codes.
scientia non olet · About LEMON Manuals