Hello and thanks for posting this waveform as exhaust and intake pulsations get you thinking for sure.
The exhaust pulsation will be offset by one pulse to the right after your trigger on this engine, and so your analysis is correct looking at the image attached.
What is interesting is the progressive fall of each peak before your second injection event. (They almost look like they are “stepping” down.
Could you post the psdata file so we can see the events and adjust the settings?
I have been looking at the “First Look” sensor booklet which contains some valuable theories about intake and exhaust pulsations http://www.picotech.com/document/pdf/fi ... nualv3.pdf
Your waveform appears to be missing an exhaust pulsation from number 2 cylinder whereby the above booklet suggests this can be caused by a “lack of fuel”.
Can you confirm the injector was fuelling for number 2 cylinder and on another note were the remaining injectors compensating the fuel trim values to carry the offending cylinder?
Why I ask is because of the size of the exhaust pulse for number 1 cylinder.
Has the fault now been rectified and if so do you have a WPS waveform from the exhaust after fix?
It would be nice to see if the pulsations have evened out or could the waveform reveal potential “near future failures” of other injectors based on a mechanically sound engine but with under performing injectors.