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Old 05-27-2010
Dennis Dennis is offline
Senior Member
Join Date: Jun 2008
Location: Malibu
Posts: 827


Here's the report. I did everything you suggested and with the same result that I had before. Then I noticed the sound of air escaping from somewhere in the area behind the firewall of the aux air compressor bay - the area under the driver's chair. This is the same area that I am hearing that "groaning" noise which at times I thought was coming from the small air tank in the same bay, but is really coming from the otherside of that firewall. I don't know if it is from the suspension valve or a hose or? I will be bringing the Coach into the shop on Tuesday instead of Wednesday - at least now I can direct them with some evidence to a probable area.

Any idea what is behind that firewall besides the suspension dump valve?

Thanks again to all of you for your help on this.

Dennis Torres
2004 M380
Malibu, California
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