Engine Controls - Tests W/O Codes - 2.5L: Symptoms: Surges
- Perform QUICK TEST. See the TESTS W/CODES - 2.5L article.
- Check ignition system. See CIRCUIT TEST JB in the TESTS W/CODES - 2.5L article.
- Check by-pass air control and idle air control systems. See CIRCUIT TEST HU in the TESTS W/CODES - 2.5L article.
- Check fuel delivery system. See CIRCUIT TEST HC in the TESTS W/CODES - 2.5L article.
- Check for vacuum leaks.
- Check EGR system. See CIRCUIT TEST HE in the TESTS W/CODES - 2.5L article.
- Check air intake system. See CIRCUIT TEST HU in the TESTS W/CODES - 2.5L article.
- Check EVAP system. See CIRCUIT TEST HV in the TESTS W/CODES - 2.5L article.