What is the reported fuel comp telling me - and what limits are acceptable - as read by my Hawkeye on Freelander 1 TD4 engines?
I have two in the yard at the moment.
Mine reads
Cyl 1 -1.6mm3
Cyl 2 -0.2 mm3
Cyl 3 +1.7 mm3
Cyl4 -O.4 mm3
And the car starts and runs well
The other - my Daughter's - has a leak off problem on Cyl3 hence needs about 6 compressions on the starter to fire up but runs very well - faster than mine.
Cyl1 + 0.1mm3
Cyl2 +0.7mm3
Cyl3 -1.5mm3
Cyl4 +0.1mm3

I don't know what "comp" is...........?

https://www.landyzone.co.uk/land-rover/td4-fueling-compensation-values.314413/

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Thanks Guys - my search didn't find that (typically) clear concise explanation from Nodge