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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