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Unusual crank trigger waveform at cruising rpm

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I had no particular reason to do this nor did I experience any concerning performance loss, but the other day while i was cruising on the freeway, i took a scope of my cam and crank triggers and noticed this curious "drop" at peak amplitude on the crank tigger waveform. Havent driven since the log but i will spend time with it tomorrow. In the mean time, Those with more experience, curious as to opinions on cause and solutions to "clean up" signal.

Sensor gap is within spec and the waveform looks clean at cranking and idle.

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I think that might be an artifact from your oscilloscope. In the 2319 picture, notice that not all the waves have that dip. My guess is you are at the maximum scaled amount, and slightly more positive value is being displayed as a negative value. Perhaps some scope settings might change the behavior (either the capture settings, zero values, or even the display scaling / offset).

ahh.. that explanation makes sense and why it wasn't translating into any performance degredation. I'm showing 10v/div on that crank scope so the amplitude as you suggest is much higher than ~25v. my initial concern was to ensure the ecu wasn't reading those as tooth counts, but it didn't appear to be the case.

My thought is a Scope setting issue as well, though I've never had anything like that before on any scope I've used, but being right at the peak dropping out like that would be such a weird signal anomaly, that I don't think that's actually the wave form.

Have you made sure that your probe ans scope settings match? The 1x/10x?

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