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flexdog1
Explorer
May 30, 2013

Cummins Frieghtliner M2 Business Class Engine Noise

I have a brand new 2013 Jayco Seneca with 360 miles on it. Engine is a Cummins ISB6.7. When I drive it, or rev it up, it sounds like it is sucking a lot of air through a screen - it is a very loud a...