Engine Controls - Tests W/O Codes: Symptoms: Surges
- Check for vacuum leaks.
- Check ignition system. See CIRCUIT TEST JB in TESTS W/CODES article.
- Check idle air control systems. See CIRCUIT TEST HU in TESTS W/CODES article.
- Check fuel delivery system. See CIRCUIT TEST HC in TESTS W/CODES article.
- Check EGR system. See CIRCUIT TEST HE in TESTS W/CODES article.
- Check EVAP system. See CIRCUIT TEST HV in TESTS W/CODES article.