2, smoky fault repair smoky vehicle petrol consumption, the frequent damage to spark plugs, the voice of nausea, inability to accelerate. Smoky fault phenomena of the following two. 1, Idle smoky fault phenomena : Idling vehicle exhaust fumes obviously, Exhaust sound boring (sometimes wonder muffler damaged), activated enlarge accelerator can be activated. Fault : (1) Idle capacity Kong transfer. (2) Float-high oil Room; (3) activated enriched valve not closed; (4) Oil Needle and the main nozzle with too much space. For the following solutions : (a) the replacement of the smaller pore volume Idle. (2) adjusting the height of the bobber, bobber observation room to the oil-bobber Room 2 / 5 namely, the oil-normal (note unpick covered under observation Yau spaces, the carburetor must just stand against the spreading out of petrol, causing oil to judge who are not accurate). (3) activated valve has been enhanced, there are three forms : manual plunger enriched valve and plunger vacuum diaphragm valve has been enhanced, Electric plunger enriched valve. Manual plunger enriched relatively simple valve repair, cleaning plunger through, the replacement of a spring or cable solution to problem. Diaphragm Vacuum - Saiga concentrated mainly check valve vacuum tubes and vacuum diaphragm whether rupture, leakage. Electric plunger enriched valve general electric heating element is damaged and electricity line fault, electric heating element damage in need of replacement. (4) Oil Needle and the main nozzle with too much space should be the new standard replacement parts. 2, the high-speed smoky fault phenomena boreal switch over to the exhaust fumes when obviously, high-speed power vehicles are obviously inadequate. Fault : (1) air inlet filter or block access; (2) Major-sectional area too large; (3) the main nozzle with the oil combined with too much space; (4) Oil-high. Solutions : (a) clean or replace the air filter paper filter heart; (2) replacement of small cross-sectional area of the main pore volume.