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Message: [QUOTE="cleatus12r, post: 1420484, member: 18093"] Back then, I wasn't interested in the actual "timing" of the calibration. I was running at an idle and just long enough to graph the optical pickup vs. the cam sensor high to low transition vs. the injection command. Obviously the injector command didn't change from one sensor to the next but there was a very slight change in cam position vs. crankshaft position and while I don't remember the actual values being that I did this 11+ years ago, the blue one was giving the PCM a later switching point for a given crankshaft position. I wasn't monitoring the high side either since the injectors are low-side switched; I didn't need to see all the flyback voltage from each injector on the high side. Back to your question, the injector command on the scope was happening WAY before anything should have been happening based on the "windows" in the camshaft sprocket likely due to calculated injector latency. I never graphed FDCS at the same time although it only makes sense to assume that the commanded injection event sent to the IDM is based on the previous revolution's position data. However, seeing anything "odd" wouldn't have struck me as odd at the time since I wasn't really aiming to get actual timing values as I knew they weren't static (as you would like to see) and I wasn't interested in getting caught spending too much time with the dealership's optical pickup over the weekend. Mostly standard peak and hold appearance from what I remember but no time measurements were made so I have no actual timing numbers. [/QUOTE]

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