My recipts always come with before and after numbers. Unless he was just cleaning and forgot to right them down. He also called tech support last time I was there and they showed him the cc flow rate to PPH conversion that GM uses. Now he can use his machines cc flow rate and pressure and come out with what is expected from a GM injecotr. So far since this has happened I have only had one set done and they were very close to what GM said they would be. But you have to take into account gausges could be a little differant. His cleaning fluid could be differant than gasoline etc...Originally Posted by gregs78cam
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