​SIEMENS VDO / CONTINENTAL injectors remanufacture

​Step 1 is to dismantle the injector, assess damage and wear.

Step 2 is the selection of the parts needed and a quote for the repair. In this step, we consult with the customer on the costs and repair time.

Step 3 is cleaning the injector in an ultrasonic cleaner.

Step 4 is the replacement of worn parts with new, original parts and the replacement of seals.

Step 5 is the installation of the injector, its adjustment and calibration.

Step 6 is to test the injector on a test machine.

Step 7 is to assign a new injector code - if necessary.

​The most accurate method is, of course, to disassemble the injectors and check it on a test bench. It is also possible to carry out computer diagnostics and read fault codes related to the operation of the injection system, or to hook up a specialised diagnostic tester.

Another way is to carry out an overflow test without disassembling the injectors. Such a test can be carried out by yourself, but it requires some technical skills and knowledge of engine operation. The test may illuminate the situation, but it will not give a complete picture of the problem. It is more of an overview test than a diagnostic test.

The simplest method is to observe symptoms such as: rough engine running, firing problems, power loss, increased fuel combustion, smoke from the exhaust pipe.

​Recognition that the injectors are ‘leaking’, i.e. supplying too much fuel to the combustion chamber or not closing properly, leading to fuel leakage, can be made on the basis of several characteristic symptoms. Here are the most typical signals indicating a problem with the injectors:

Increased fuel consumption: If you notice that your car is using more fuel than usual for no apparent reason, this could be a sign that the injectors are delivering more fuel than needed.

Engine firing problems: Injectors that ‘funnel’ can cause the combustion chamber to flood with fuel, making it difficult or impossible to start the engine, especially in cold weather.

Uneven engine running: If the engine runs unevenly, especially at low revs, this may be due to injectors not working properly. Uneven running may also be more noticeable when driving at low speeds or when accelerating.

Smoke from the exhaust: Excessive fuel in the combustion chamber can lead to thick, black smoke coming from the exhaust pipe. This is particularly noticeable in vehicles with diesel engines.

Decrease in engine power and performance: Too much fuel delivered to the cylinders can reduce engine efficiency, causing a drop in power and acceleration problems.

Fuel leakage: Physical damage to the injector or a leak in the injector can lead to fuel leaking around the engine.

Vehicle diagnostic system (OBD) fault code: Today's cars are equipped with sophisticated diagnostic systems that can register various types of errors, including injector problems. Connecting a diagnostic device can help identify the problem.