Engine Controls - Tests W/O Codes: Symptoms: Surges
- Check IAC assembly. See CIRCUIT TEST KE in the TESTS W/CODES article.
- Check air intake system. See CIRCUIT TEST HU in the TESTS W/CODES article.
- Check for vacuum leaks.
- Check fuel delivery system. See CIRCUIT TEST HC in the TESTS W/CODES article.
- Check EGR system. See CIRCUIT TEST HE in the TESTS W/CODES article.
- Check EVAP system. See CIRCUIT TEST HV in the TESTS W/CODES article.