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Old 10-16-2019, 07:29 PM   #6
litteng
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Join Date: Nov 2008
Location: S'toon SK. Canada
Posts: 122
Garage
bore scoring is a possible cause. need to pull plugs, check for dirty oily plugs, good starting point to then carry out a borescope...

this is also occuring on the 981 engines with direct injection..

hope im wrong
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