How to efficiently test diesel fuel injectors

28 May 2023

Nowadays, there’s no shortage of Internet folklore about your diesel fuel. But remember, that’s exactly what it is: folklore. If you read about adding gas, transmission fluid, or used engine oil to prolong your injectors’ lifespans or to help them through winter…don’t do it.

These are the types of things that may have worked years ago, but they no longer help the more complicated injectors of today. Many are computer-programmed to expect diesel. When they receive something other than diesel, they simply don’t know what to do with it!

That being said, using high-quality diesel fuel additives, such as Stanadyne or Alliant Power, to your diesel fuel does lengthen the injector’s shelf life. However, ultimately, these injectors do only have a finite amount of life in them and are subject to the normal wear and tear.


Some commons signs your diesel fuel injectors might need replacing, cleaning, or, at the very least, testing are smoke or a rough-running engine. Another sign could be if your vehicle’s diesel filter is regenerating more frequently than it usual.

One of the most common symptoms of faulty fuel injectors is an extremely violent or rough engine idle. If fuel is not properly provided to the engine cylinder, it will result in a choppy engine, when the car is in idle. Gasoline Leak: Fuel injector can crack or break, which will cause a gas leak.

When you notice these symptoms, it’s time to bring in your injectors—please do not try to service them yourself. No matter your experience or knowledge, it’s near impossible to precisely, accurately, and efficiently test diesel fuel injectors without the right test bench.

This kind of injectors test equipment provides the most efficient and precise way to test modern high-pressure fuel components. It tests that include high-pressure nozzle and control valve leak testing, injector start behaviour, idle speed adjustment tuning, full-load quantity, and much more.

More often than not, this test lets you make an informed decision about the fate of your injectors and saves you hundreds of dollars-even if some injectors need to be replaced. From this tests, you identify exactly which need replacing so you don’t have to throw away the good with the bad.

For over 20 years, above all Taian Crystal wanted to make a difference in thecommon rail test bench industry, and by taking the decades of knowledge we acquired, we can confidently do that.

Keywords: common rail test bench

Originally published 28 May 2023, updated 28 May 2023.

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