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PicoScope 7 Automotive
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Not sure what you mean here? Also second image is confusing but data file would clear that up and using the Amp clamp would probably be beneficial.the running ones appear (To me) to show a 3 fire event in 5/ms
WhoopsTerry Ferguson wrote:Thanks for comment, This was the first time I used scope,(so not at recording stage yet) I had it set 10ms/div, X1, 1ms sample rate, trigger Auto. I had two 60amp clamps in 20 amp mode, Clipped over injector wire at ecu. First picture had 1 clamp on a firing cylinder & 1 on a non firing cylinder, I then had It on two firing cylinders, which show 2 identical trace which had what I assume was 3 firing events, these were over about 5ms from first to last, while watching the two firing signs One just went Off as I watched, no miss on the engine, when I moved the clamp to another cylinder wire, it had started running on a different cylinder, I am sorry for my vague description but I am not sure what I am doing with the scope, I am studying as I go, not ready to use scope professionally, but I have it here & thought I would give it a go. Yesterday I had it on a Citroen c3 on the 2 oxygen sensors, I got the pattern I expected for pre cat, But the post cat had virtually the same paten, I'm assuming its the cat at fault from this data & that neither of the sensors are faulty, I also ran graph on delphie scan tool both graphs were 0.1 to 0.8 volts, just double checked I was using pico correctly?
I'm inclined to say (without those files and not knowing the engine) that's possibly pre/main injection events. https://www.picoauto.com/library/automo ... celeration3 fire event in 5/ms