The basic method to confirm the injector failure
Injector at high temperature and pressure because of the long-term thing, it is likely to cause Mifengbuyan, drip and spray bad, impede. These give rise to prevent black smoke about the diesel engine, power is not enough, the combustion system, abnormal sound, pull the cylinder and piston top burning tension, such as prejudice. However, in the field hinder clear, how to confirm the prejudice because of the problems caused by the injector, is deterring the point. Things based on many years of practical experience, to be sure the injector has the following basic essentials of quality problems:
1, the first direct observation of diesel engine exhaust environment, if the above-mentioned problems the injector, diesel engine exhaust should be: start-white smoke, black smoke at full load things and not accompanied by problems with power.
2, single-cylinder fire method:
Starting in the low speed diesel engine, then release the pressure by cylinder tubing, pressure tubing when the release of a cylinder, the diesel engine exhaust smoke color changes significantly, then clarify the injector or cylinder plunger / outlet valve problems.
3, direct observation
Remove the exhaust pipe, starting at low speed diesel engines, can be seen that a cylinder exhaust smoke color is not normal, you can start or determination of the cylinder injector plunger / out valve problem.
4, in the confirmation of a cylinder or injector plunger / out valve problem, you can remove the cylinder injector, the injector tester fuel injector on whether to confirm the problem.
5, if the tests confirm the injector end of Britain there are problems, it certainly needs repair or change the basis having injector (mouth).
6, if the site is not close to the engine injector tester, as a temporary step, you can look at the raid on the diesel engine fuel injector is a problem. Specifically: the opposite of the exhaust smoke two cylinder injector to change the use, start engine and observe the color of exhaust smoke, and if the use changes, the original do not smoke smoke increases the cylinder, then clarify the spray oil cooler problem. If two cylinders are increased smoke, then clarify the cylinder (the original black smoke) the plunger / valve probably have a problem. ,
7, if the test did not confirm the fuel injector problem, fuel pump is necessary to further the professional confiscated.