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The following is a guide to the most common causes. Vehicle emission systems vary by manufacturer and are too numerous to list here. |
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Carbon monoxide (CO) is partially burned fuel. Too much CO indicates that the engine is getting too much fuel and or not enough air. The following are potential problems:
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Dirty air cleaner or air filter |
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Contaminated oil |
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Stuck choke |
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Misadjusted carburetor or internal carburetor problems |
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Leaking or malfunctioning fuel injection system |
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Malfunctioning thermostat |
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Faulty catalytic converter |
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Malfunctioning air pump or system |
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Engine management or computer system repairs |
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When your car is warm, there should be no visible smoke from the tailpipe or any part of the vehicle. Smoke can be caused by dirty or worn engine parts, carburetor malfunction, dirty oil or other problems. When the problems causing excessive smoke are corrected, test results for other pollutants may change. |
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Hydrocarbons (HC) are unburned fuel or oil. One of the most Common causes of hig HC levels is a misfiring engine. Some causes of misfiring include a lean fuel mixture (too much air) or faulty spark plugs. The following are potential problems:
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A misfire from the secondary system, like spark plug and wires, rotor, ignition coil, or distributor cap |
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Vacuum leak or malfunctioning or misadjustment |
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Spark timing |
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Air pump not working |
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Catalytic converter not working |
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Worn valves, seals, guides, or piston rings |
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Carburetor or fuel injection system malfunctioning |
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To be at the forefront of emission control and the promotion of better air quality in Nigeria
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| To be a reference point for vehicle and generator emission control programmes in Nigeria. To be highly committed to innovation, best practices, strict quality standard and transparency through trained and competent personnel |
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