Hi
L322 V8 4.4 2002

using the IIDTool,
I checked live values for cylinders and the tool showed knock threshold values for the cylinders, with engine running at still ( 650 / 680 rpm ) as follows :

knock-threshold values for all cylinders in the 0,8-0, 9 range ,
except for one cylinder at 1,3

i dont understand what it means exactly and whether any action should be contemplated .
can someone expert please explain ?

thank you

I'm far from an expert but...

The knock sensors are piezo-ceramic crystals, which basically listen to the cylinders and let the engine ECU know if detonation (pinking) is happening in a particular cylinder, the ECU then reduces the ignition advance for that cylinder, it can adapt to poor quality fuel without wrecking the engine...

If the result from a sensors goes outside a predetermined range then a fault is stored in the engine ECU, so I would say your readings are perfectly normal and within range.  Pete

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2014 L405 Autobiography SDV8 4.4 Loire Blue Ebony interior
2011 L322 Vogue SE 4.4 TDV8 Baltic Blue. Parchment over Navy Interior. Sold
2012 L322 Autobiography 5.0 Supercharged Ipanema Sand, Jet Interior. Sold
2002 L322 Vogue 4.4 V8 Epson Green, Ivory over Aspen Interior (Fatty Offroader) Sold
-Click for Project Fatty off roader-