Department of automobile engineering
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Next, multiple flow volume tests are performed. First, all of the injectors are flow tested in both a static (wide open) and a dynamic (pulsed) mode. These are “timed” tests and range from 15 to 120 seconds. The results are noted for comparison after the cleaning process. As you can see from this illustration, the injectors can have a wide range of flow volume. This shows that these injectors are in need of cleaning and the engine they came from would not have been running as smoothly or efficiently as it would have if all of the injectors were flowing the same volume. Now the injectors are flow tested again both statically and dynamically until one or more of the injectors reaches 100ml in flow. 
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