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 Car repair knowledge: the exhaust abnormal color: color change frequently observed engine exhaust emissions, is conducive to understanding engine operating conditions. For example: a normal gasoline engine exhausts should be colorless and transparent. When gas blue Lingshui vehicle maintenance inspection, show the engine burning oil; when the exhaust is black, indicating incomplete combustion, ignition timing and valve timing has a question: when the exhaust gas is white vehicle maintenance inspection, show fuel moisture But winter can not be mistaken as a white exhaust the fuel in the water ah! The company is specialized to provide you with car repairs, you are welcome to visit or telephone information, vehicle maintenance knowledge: Important parameters clever use of intake manifold vacuum diagnose engine faults intake manifold vacuum as troubleshooting gasoline engine, can detect the cylinder, valve bodies and with Valve Timing and many other technical condition of the engine Qiongzhong vehicle maintenance inspection, in a foreign country is considered to be the most important and one of the most practical and rapid test method, however, the repair shop in the country, but few people as a fault diagnosis. Although a random port in the intake manifold, connected to the vacuum table and even air conditioning manifold pressure gauge can be detected, the method is very simple, but this method has not been widely promoted. The engine start warming up to normal operating temperature, intake manifold connected to the vacuum table, keep the engine idling, can be diagnosed through a vacuum gauge readings. (1) vacuum gauge reading has stabilized at between 57-7lkPa, compared to normal. When the throttle is opened and closed quickly, along with pointers can oscillate between 7-84kPa, it further demonstrates technical condition. (2) reading between 51-68kPa swing, indicating sticky valve or a problem with the ignition system. (3) as significantly lower than normal, mainly rings, intake manifold or carburetor gasket leak caused. May also be associated with gas ignition late or late-related. In this case, if a sudden large open and close the throttle, the pointer down to zero lingao vehicle maintenance inspection, and the bounce is less than 85kPa. (4) vacuum gauge pointer slowly oscillate between 41 ~ 61kPa, said the bad idle speed adjustment. The company is specialized for car repair, you are welcome to visit or telephone information Hainan Auto Service | Auto Service | Haikou hair up car service provided by Haikou Longhua up Daihatsu Motor Service. Haikou Longhua up Daihatsu Motor Services (www.hnznz.com) strong, credible, Haikou in other industries has accumulated a large number of loyal customers. The company better work attitude and constantly improving innovative ideas will lead up to Haikou Longhua Automobile service and you hand into the brilliant, for a better future!