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Cummins X12 Injector

Does fuel injector polarity matter?

Some engine manufacturers such as Cummins, use injectors without connector plugs or with unmarked terminals. If this is the case, how should we connect the cables on the injector? Will the ECU show injector faults if we reverse the polarity? Does injector polarity matter?

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Common Rail

Diesel Common Rail System – How does it work?

Diesel Common Rail Fuel systems are utilised to increase engine power, reduce emissions and make Diesel engines run smoother and more “civilized”. However they require special treatment and could pose a significant health risk if the person working on the system does not know its basic principles.

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Cummins Inline 7

My diagnostic tool suggestions

Choosing a diagnostic tool shouldn’t be taken lightly. It is an investment for the future! The list has been compiled based on my diagnostic and training experience. I still use the majority of them almost daily!

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SCR single module aftertreatment

Why do we need SCR systems?

Due to new, stricter emission legislation, all new Diesel engines need to be equipped with a special catalyst (SCR) to reduce harmful NOx emissions to Water, Nitrogen and Carbon Dioxide. Sounds easy? Well… it’s not that simple. Keep reading to understand why!

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Adblue Cap

What is Diesel Exhaust Fluid or AdBlue?

AdBlue is an automotive-specific liquid mixture of 67.5% Water and 32.5% Urea. It is injected before the SCR catalyst to help reduce NOx to virtually zero. It is very important to learn some simple tricks about Adblue to avoid having to deal with system faults that could be avoided!

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Meet the author
George Sarimpalidis

George S.

Technical Trainer, content creator

I enjoy learning about and explaining complex systems in a way that everyone understands!

George S.

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