Ambient pressure=800mV. Brand new oil separator with PCV valve. If PCV valve were sticky, should not interfere with all cylinders back pressure? I would rather point to vacuum pump pellet sticky/worn.

Nissan X-Trail 2.0dci (M9R) 2017 . Every few months MAF sensor, intake pipe and filter box gets oiled(blow-by gasses), and EML comes on.Compression 22-23bars , cylinder leak no more than 10%, cylinder walls look ok except few minor scratches.

Intake camshaft is on time , but exhaust is advanced roughly 60-70 degree which means 7 teeth of camshaft sprocket, more or less.

Exhaust camshaft advanced 3-4 teeth.

Sorry, CH4 absolute press sensor, CH3 delta press sensor, CH2 injector signal.

Tail pressure pulse measured at the same time with CH2 absolute pressure sensor and CH1 delta pressure sensor.So, different pressure transducers result in different signal shapes.

1. Disconnect EGR valve and see if any change in signal shape. Slightly rise engine rpm around 1000 and look if they look like the same.

HP pumps with 3 pistons in star like CP1 andCP3 supply fuel at even pressure no matter the drive shaft angle. So, not necessarily need to time. Rail pressure builds up linear when cranking before to start. Instead, the ones with 2 or 1 piston MUST be timed as output pressure vary with pump shaft ang...

See if the CMP signal failure happens on the same trigger wheel teeth or is randomly.