Besides the engine carbon cleaning unit what else do I need?

You will need a supply of deionised water, some potassium hydroxide electrolyte and we also recommend buying a good quality OBD scan tool (with DPF functions) so you can check the vehicle and notify the customer of any faults before you start the cleaning process. You will also need a small funnel and digital scales to weigh out the electrolyte. Kitchen scales are fine.

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