The exhaust gases

Analysis of exhaust gases is an important and effective checks to help detect a fault in the carburetor engine. If you experience problems with the engine, ignition system, intake and exhaust systems immediately changes the nature and chemical composition of exhaust gases. To find the ratio of the various products of combustion in the exhaust, the need for costly gas analyzer. But, besides the chemical composition of gases, it is equally important to observe other characteristics of exhaust. These include temperature, color, uniformity of sound and the strength or power gas pressure at the outlet of the pipe. To measure these parameters, you can use an ordinary medical stethoscope, which is used to listen to your heart and lungs in humans, as well as a thermometer with a measuring range from 0 to 120 ° C. Experienced mechanics stethoscope and thermometer instead of using his hand, being careful, because when good catalyst exhaust gas temperature at the outlet of the pipe can rise above 100 ° C. The analysis of all options should be carried out at the idling speed and at short-term increase in engine speed to 1500 - 2000 r / min. During the diagnostic careful not to inhale gases, as in their composition are deadly to the human body elements. Lowering the temperature of the gases from the normal values ??cause malfunction in the engine cylinders (valve burnout, getting cooling. Fluid, etc.), the failed catalyst is too early ignition. Increase from the normal temperature of gases occurs due to late or poor ignition engine cooling. The color depends on the exhaust valve stem seals on the valves and wear CPG. Bluish color of smoke, like cigarette means that the combustion chamber gets a lot of motor oil. Black smoke indicates a rich mixture (carburetor malfunction, intake system and ignition). Properly working catalyst in the exhaust system muffling dozhigaet combustion products, which, after oxidation of partially converted to carbon dioxide, nitrogen and water. This dramatically raised the temperature of the exhaust and the water begins to come out in the form of vapor and droplets of condensed water. The interior of the exhaust pipe is washed in this way to bright colors and becomes gray or red color. The exhaust system without a catalyst in good condition engine, power systems, ignition systems also become rusty or gray tint the car during long trips. If the vehicle is used in city mode (frequent, short trips), the inside of the exhaust pipe does not have time to be cleansed of carbon and therefore may have a black surface, even when absolutely good engine and power systems and ignition. In the cold season in the exhaust increases the amount of condensed water as the pipe gets colder, and the gas temperature is almost unchanged. The quantity of water condensate increases with the lengthening of the exhaust system. In winter, during prolonged operation of the engine on idle speed in the system is going to kill a lot of condensation, so that one, brief increase in engine speed can cause abundant water pressure from the muffler. In cold weather, the inner surface of the tube is washed by the warm drops of condensed water and is more effective cleaning of the inside surface. The uniformity of the sound of exhaust gases is a guarantee that the engine and most of the systems are working properly. If you have many faults carburetor, ignition and exhaust sound CPG uniformity violated muted applause, each of which denotes the omission of ignition of the mixture. Claps better captured if the hand closer to the exhaust, and an experienced auto mechanic uses it to listen to the motor idling. Each group has its faults periodicity or frequency of flapping. Diagnosis uniform exhaust sound vaguely reminiscent of the code in diagnosis of electronic engine management system. Short series of pops that appears after closing the throttle, does not mean no problems. It's a natural reaction to close the engine throttle after peregazovki in cases where the valve is not equipped with shock absorber (damper) is closed. Damper does not allow a sharp closing flap, the closing occurs smoothly, with little delay and no bangs. Carburetors are not equipped with throttle damper allow the exhaust popping after peregazovki. Progorevshy silencer hundreds of times amplifies the sound of those claps. The following checks are made on the idle. Frequent the same claps at regular intervals (4 chl.. 1 second) could mean a permanent fault in one cylinder. The reason may be: wet or not completely squeezed spark plug, high resistance in a high-voltage wire or the tip, the breakdown of the outer insulation high-voltage wire, a significant air leak on the intake manifold, near one of the cylinder valve or piston progorevshy. Frequent irregular claps, the frequency of Morse code-like meaning: too early ignition, the mixture is a very poor idle air leak on the intake manifold, increased resistance to several high-voltage wires, broken or covered in black soot spark plugs, incorrect adjustment of thermal clearance on the valves, a flagrant violation of the installation belt or chain timing. Single or group claps claps series occurring with pauses of 1 second or more mean: gaps on spark plugs electrodes smaller than normal, getting oil to the electrodes of spark, poor idle mixture, early ignition. When the overall sound of the motor at idle speed sometimes interrupted by loud gunshots in the muffler, it usually means trouble spark plugs. Power pressure gas at the outlet of the exhaust pipe indicates the capacity of killing exhaust.