the running ones appear (To me) to show a 3 fire event in 5/ms
Terry 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
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