Diesel Injector Fuel Injector 23670-51040 Denso Injector for Toyota Land Cruiser 200

The most common faults of the fuel injector mainly include: clogged nozzle hole, stuck needle valve, too large diameter of the nozzle hole, insufficient fuel injection pressure, oil dripping from the fuel injector, etc. Intermittent crackling sounds, etc., seriously affect the normal operation of the ship. Now the fault analysis and maintenance methods are introduced respectively. 3.1 Blockage of nozzle hole or stuck needle valve 31
If the atomization of diesel oil is poor, it will lead to insufficient combustion of diesel oil and excessive carbon deposits, which are especially easy to accumulate around the nozzle hole, work for a long time, and block the nozzle hole; at the same time, use impure diesel oil mixed with solid particles, due to The needle valve reciprocates in the needle valve body, accumulating over time, and impurities accumulate on the inner wall of the needle valve body, causing the needle valve to be stuck. Once the nozzle hole is blocked, the fuel supply pressure of the fuel injection pump will increase significantly, and the life of the fuel injection pump will be reduced if it is subjected to high pressure for a long time. The fuel injector nozzle cannot work, which will inevitably lead to the failure of the engine to start, large fluctuations in operation, flameout, and reduced working performance. If things go on like this, the life of the engine will be reduced. ~20 min, then take out the fuel injector assembly, use a slender steel needle to clear the dirt on the nozzle hole, put it in diesel oil and clean it: if the needle valve is stuck, also immerse the fuel injector assembly in diesel oil Preheat for about 15 minutes. After taking it out, clamp the end of the needle valve with a vise wrapped in soft cloth, slowly pull out the needle valve, and rotate while pulling it out. Clean the grind. After the cleaning is completed, in order to check whether the fuel injector assembly is qualified, a spray test must be done on it, and if it fails, replace the fuel injector assembly. When replacing a new couple, we need to pay attention to first immerse the new couple in 70C diesel oil for about 15 s, so that the diesel oil completely dissolves the anti-rust oil on the surface of the new couple, then pull out the needle valve, and use clean diesel to thoroughly clean the surface debris . In addition, we must use high-quality and clean diesel oil. Before the diesel oil is injected into the fuel tank, it must undergo more than 2d of precipitation. The fuel tank must be kept clean and upright to prevent other impurities from entering the coupling. At the same time, we can also use the oil pump filter