High Precision New Diesel Injector Nozzle DN15PDN57 Nozzle Auto Spare Parts

To determine whether the fuel injector needs to be replaced can be from the engine operating conditions, exhaust emissions, fuel consumption and professional test results, the following are specific methods:

Engine working condition
Difficulty in starting: If the injector nozzle is clogged or damaged, the fuel cannot be sprayed normally or atomized poorly, resulting in an abnormal concentration of combustible mixture, resulting in difficulty in starting the engine, such as turning the key several times to start, or even unable to start.
Decrease in power: due to injector failure, fuel can not be accurately and fully injected into the cylinder to participate in the combustion, so that the engine power output is insufficient, manifested in slow acceleration, climbing hill climbing powerlessness, at high speeds when the power is obviously not as good as in the past.
Running jitter: the injector nozzle work is not normal, will make the fuel injection of each cylinder is not balanced or combustion is not sufficient, causing the engine to jitter. When idling can obviously feel the body shaking, or in the process of driving can feel the engine has an abnormal vibration.
Strange noise: Injector nozzle failure may lead to abnormal fuel injection, triggering the engine to produce abnormal noise, such as crisp metal knocking sound or irregular “popping” sound.

Exhaust emission condition
Abnormal color: Normal exhaust should be colorless or light gray, injector problems, may make the fuel burning is not sufficient, the exhaust will be black; if the injector has a drip, may lead to unburned fuel in the exhaust, exhaust will have a pungent gasoline smell, and may be accompanied by blue smoke, indicating that there is a phenomenon of oil-burning, but also may be related to injector failure.
Strong odor: when the injector is not working well, insufficient combustion will produce a lot of harmful gases, the exhaust will emit a strong pungent odor, such as rotten egg smell, indicating that the injector may need to be replaced.

Fuel Consumption
Increase in fuel consumption: Injector clogging or spraying too much or too little fuel will make the fuel can not effectively participate in the combustion, resulting in fuel waste, resulting in a significant increase in vehicle fuel consumption, such as the original tank of fuel can travel 500 kilometers, and now can only travel 400 kilometers or even less.

Professional test results
Fault code reading: use a professional automotive fault diagnostic instrument to read the vehicle's fault code, if the display and injector-related fault codes, such as injector circuit failure, injector flow abnormalities, etc., indicating that there may be problems with the injector.
Injector test: in the professional maintenance store, can be cleaned through the injector nozzle tester for the injector nozzle test, check its injection pressure, injection volume, injection uniformity and atomization effect and other indicators. If these indicators are outside the normal range, indicating that the injector nozzle needs to be replaced.
Dismantling inspection: remove the injector from the engine, visual inspection of the appearance of the injector to see if there is a buildup of carbon deposits, blocked injection holes, injector head damage and other conditions. If the carbon buildup is serious and cannot be restored to normal after cleaning, or if there is obvious damage to the injector nozzle, it needs to be replaced.