Engine Controls - Tests W/O Codes - 1.8L: Symptoms: Backfires
- Perform QUICK TEST. See the TESTS W/CODES - 1.8L article.
- Check for vacuum leaks.
- Check ignition system. See CIRCUIT TEST JB in the TESTS W/CODES - 1.8L article.
- Check engine compression. Check engine mechanical condition. Check intake manifold, manifold gasket, camshaft and valves.
- Check exhaust system. See CIRCUIT TEST HF in the TESTS W/CODES - 1.8L article.
- Check fuel delivery system. See CIRCUIT TEST HC in the TESTS W/CODES - 1.8L article.