Troubleshooting Vehicle - a process that can take a long time. The quickest way to find the fault is to follow the logic checks. First you need to interview the owner of the car. The master must understand exactly what the customer complains and assess their capabilities in carrying out repairs. If it does not find out immediately, then later misunderstandings can occur. Sometimes there are customers with such requests, which in some cases be better to abandon the repair. Before you undertake the repair of the carburetor to make an assessment of its overall condition. You should also take into account the age of the car and the wishes of its owner. It may happen that to repair, as the naive customer wants - it will be impossible. We must think carefully before you take to repair the broken, bent, sometimes cooked by electric wire and twisted the carburetor. To examine the status of a well-carb, it is necessary to remove the entire air filter housing. Externally, the carburetor and air filter, you can determine how long ago it was served and on the judge for the owner to his car. Any filter has a parameter called hydraulic resistance. In a new, clean, dry filter is the least resistance. In the process of clogging the filter element increases its resistance. Moisture filter also increases the resistance. Carburetor - is a vacuum device that mixes air and fuel - these two components of the working mixture. Blocking access via a single component, we increase the percentage of another component in the working mixture. Therefore, when the air is hard to penetrate the clogged filter - increases gas mileage. At a certain state of the engine and carburetor adjustments for a clogged air filter can increase engine power due to the reduction of the air in the working mixture. But it will happen until some time after which the engine power will decrease with increasing degree of contamination of the air filter. Large role in the contamination of the air filter and carburetor are zasmolenii diffusers crankcase gases. There is a direct correlation - the more wear on the motor, the greater the amount of crankcase gases. And this, in turn, increases the intensity of pollution carburetor. In addition to clogging properties, crankcase gases are another unpleasant feature. It is composed of a pair of gasoline, which for some reason get in the engine oil. There are several ways of getting gasoline into the oil: gasoline pouring over the top of the float chamber, fuel pump diaphragm is pierced, broken plugs or ignition system, frequent, short trips by car is cold with a cold engine. Gasoline fumes are present in the oil to a small extent even in the new motor. Their number increases in the oil at frequent short trips to the motor is cold. The sharp increase in the amount of gasoline in the oil leads to the crankcase vapors pereobogascheniyu gasoline. Therefore, adjusting the carburetor should always be carried out with detached crankcase ventilation tube. After pouring the new engine oil crankcase gases have the least impact on the working mixture. The longer oil life, so this effect may increase. Test the impact of crankcase gases in the working mixture can be alternately connecting or disconnecting the tube crankcase ventilation when the engine is at idle. Gases rich in gasoline vapors, reduces the idling speed. To check you can use a gas analyzer and monitor the readings of CO and CH. Rapid clogging of the air filter may be caused by exhaust gases break through the looseness of the exhaust manifold near the intake vents clean, heated air. Exhaust gases can be completely clog the air filter in just a few hours of driving a car. Repair the carburetor on this car should be performed only after the removal of exhaust system leaks in the engine compartment. Otherwise will have to re-wash the carburetor in a short period of time. Depending on the general condition and cleanliness of the carburetor should decide whether to repair. If the carburetor is relatively clean, you can immediately check his alignment. A thick layer of mud and coke at the top of the carburetor requires mandatory cleaning and purging. Do not take to repair the carburetor, which are immediately visible gross damage, cracks and other signs of the body barbaric attitude. Repair of these instances brings nothing but trouble. Completed the general test adjusting the idle speed. Adjusting the carburetor on the heated serviceable motor takes one, two minutes and is not a big deal. But if you can not customize the carburetor, then turn the adjustment screws for a long time - is meaningless. In this case you should look for and fix the fault. Throughout the series of adjustments to the engine carburetor is set to last. This means that the thermal control clearances on the valves, the ignition angle and timing marks line is to set the carburetor. Having listened carefully to customer complaints, it is necessary to open the hood and start the engine. Very often, the fault can be detected by careful examination of the engine compartment. It will be better when starting the engine will produce a client or your assistant. And your job - this time to observe the engine. Leakage of gasoline at the fuel pump and nozzles, torn or nenadetye vacuum hoses, flipping on the high-voltage spark wire or ignition coil, air filter suspiciously hanging out at the time the motor, which means fixing the broken cushion the carburetor. All this is easy to find a simple inspection. Some mechanics even sniff the air near the battery. Just do not take a deep breath, because the gas that is extracted from the battery can burn the lungs. The existence of odor indicates increased voltage in the battery. It may be observed expansion of the plastic case battery, whose walls are semicircular. If at this time drown out the engine, you can hear a rapid boil and hiss of gas in the accumulator. In this case you can not connect to the battery terminals are no customers: the tester, carrying, etc. At the moment the connection may slip and spark an explosion of injury or injure others. About the car I do not speak. Hearing the hiss of the battery, it is best to open jams for free exit of gas and wait the end of the boil. At the time of stopping the engine is also useful to listen to the vacuum brake booster if it is installed on the car. Immediately after stopping the motor can be heard hissing of air at the junction with vacuum booster with brake cylinder during one - two seconds. This means the damage hiss seal the vacuum brake booster, resulting in unauthorized air leak. In the presence of leaks can not be properly adjusted carburetor. The air in the engine must only come through the carburetor or the other, intended for this device. Air leak through the seal vacuum brake booster for motor vehicles characterized by "Ford", "Samara" and "Lada". This problem persists for twenty minutes, replacing the seal amplifier.
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