The fluid was basically a base fuel without any additives, I think it was Heptane, but using regular pump gas would be fine if you were curious enough to build your own rig.
I think pump gas would be a better agent to use for flushing out the injectors because it was cleaning additives in it(most of them do anyhow). I'm sure these specifically formulated cleaners are effective when just flushing through the engine, but i don't think they'd come close to a pulsating flush method.
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