Black Smoke (Rich Mixture)
- Check for restricted air cleaner/air intake duct.
- Check for restricted fuel return hoses.
- Perform QUICK TEST. See TESTS W/CODES - EEC-IV (2.0L) article in the ENGINE PERFORMANCE section. If code is present, perform appropriate CIRCUIT TEST.
- Check fuel pressure. Refer to step 2) of CIRCUIT TEST H in TESTS W/CODES - EEC-IV (2.0L) article in the ENGINE PERFORMANCE section.
- Check ignition system. See IGNITION SYSTEMS in SYSTEM/COMPONENT TESTS - EEC-IV (2.0L) article in the ENGINE PERFORMANCE section.
- Check fuel delivery system. See FUEL SYSTEM in SYSTEM/COMPONENT TESTS - EEC-IV (2.0L) article in the ENGINE PERFORMANCE section.