Exhaust Smoke Or Smell

Visually inspect the following components of the catalytic converter, exhaust system and related components that may effect exhaust gas quality, cause backfire or loss of power.

• Check for leaking fuel injectors.
• Check for damaged air inlet passages.
• Check for inoperative EGR valve. See I - EEC SYS/COMP TESTS article in the ENGINE PERFORMANCE Section.
• Check for pinched or crushed exhaust pipe.
• Check for loose or damaged vacuum hoses.
• Check for incorrect idle speed. See ADJUSTMENTS article in the ENGINE PERFORMANCE Section.
• Check for dirty air filter.
• Check for damaged catalytic converter.
• Check for misrouted or damaged wiring.
• Check for damaged coil, distributor or spark plugs.
• Check for corroded or loose wiring harness connectors.
• Check EGR system. See I - EEC SYS/COMP TESTS and G - EEC TESTS W/CODES articles in the ENGINE PERFORMANCE Section..
• Check air intake system. Also, ensure throttle plate and linkages operate properly.
• Check fuel delivery system. See I - EEC SYS/COMP TESTS article in the ENGINE PERFORMANCE Section.
• Perform QUICK TEST. See G - EEC TESTS W/CODES article in the ENGINE PERFORMANCE Section.
• Check PCV system.
• Check engine compression. Check engine mechanical condition. Check intake manifold, manifold gasket, camshaft and valves.
• Ensure idle speed is correct. See IDLE SPEED in ADJUSTMENTS article in the ENGINE PERFORMANCE Section.
• Check cooling system.