This unit works well with many injectors. I've used it at GM and Ford so far. Very repeatable. After applying a few pulses to each injector to check, I would say that each of them gave identical results, so there was no need to worry about the quality and efficiency of the devices. A bad injector gave the same PSI rating as a good one every time. It doesn't work with GDI injectors, but for the price, it's a must-have tool.
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