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					Originally Posted by kk2002s  Oil will buildup in the intake pipes over time with a good AOS. It is a good maintenance check to take the intake parts apart, clean the pipes, runners and TB. I just use a rag/paper towel to clean up the pipes and TB cleaner on the TB. The AOS is sucking small traces of oil back into the engine to be burned offSo after a fail you may have a more significant amount sitting in there and resulting in visible smoking even though things are ok
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Ok Thanks !  I will take it apart and clean it again 
