I use a different machine, it's a Star brand and is pretty old, but does everything that you need for cleaning fuel injectors. I can backflush, ultrasonically clean (separate unit) check balance and do leakdown tests. You would be suprised how much injectors can clog up. I never really saw it as bad on disc type injectors, usually the screens were dirty and a backflush would make a hell of a difference, though not as much as you posted. Most of the issues I had were with pintle style injectors. Fuel injector cleaners are bunk and don't do anything. I just need to check the machine out again and get the platter fixed so it'll do balance testing again.
