Ignition System Checks
WARNING: This page is about a different car, the 2003 Pontiac Vibe. However, it is still accessible from the selected car via links, so may be relevant.
- Check ignition system secondary output using Spark Tester (J 26792), or equivalent. See ELECTRONIC IGNITION SYSTEM DIAGNOSIS under IGNITION SYSTEMS in SYSTEM & COMPONENT TESTING - 1.8L VIBE article.
- Inspect the spark plugs for correct operation and good ignition system performance.
- Check Knock Sensor (KS) and sensor circuit shielding. A faulty knock sensor or signal interference could cause excessive retard of the ignition timing advance. Observe the spark parameter on a scan tool and compare with a known good vehicle. A typical value at 60 MPH (98 km/h) with all engine accessories off is 26-32 degrees.