I have a 2004 Monaco 34 ft. It is a diesel pusher. Purchased in May of 2017. At purchase it had 29,000 miles - was kept in a garage by the original owner. When I purchased it I had a local mechani...
Noise is like a water leak in that it is hard to pin down the source. Your mention of your issue being related to acceleration leads me to higher boost levels and that leads me to a turbo boost leak possibility. It's worth checking as the sound can travel thru the coach and reflect back from the windshield. Another thought is the genset. Are you running it as you travel down the road? It is right under your feet after all.