Got this ML in today with a dead miss from another workshop.

Scan of the ECU reveled no fault codes stored so I straight away decided to head for the WPS.

So with the WPS in the exhaust and using a bit of rag to increase the back pressure with a cylinder 1sync i got this.


Now i had a slight issue, as i know with a 4 cylinder you need to ignore the first pulse after your sync and on a 6 cylinder you need to ignore the first 2 pulses after the sync.

So I now produced a misfire on cylinder 4 and from the below capture I could start to work out firing order.


So armed with this info I could now label my original capture.


From here on in the job became simple swapped over numbers 2 and 3 cylinder injectors and retook captures


I was now in a confident position to replace the injector which cured the fault so one final job left was to retake the capture and as you can see all looks good



Regards
Carl