We have 2020 Forza. After driving maybe a hundred miles, we have a strong diesel fumes smell inside and a raw diesel smell outside. The front of our towed and the back of the motorhome will be covered with an oily, sooty mess. It does not do this every time we drive it but way too much of the time. We are new to motorhomes and could use some suggestions for this problem.
Something definitely wrong there with the engine, the exhaust plumbing setup, the turbo, and/or the DEF system. Whatever it is might still be covered by the chassis warranty so you might take it to an engine or chassis shop. Best to avoid the dealer unless you know their work.
My '02 CAT doesn't even use DEF but the exhaust is clean, rarely leaves any deposits on my towed car.
Say, when was the last time you checked the DEF level?
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'02 Winnebago Journey DL, DSDP, 36' of fun.
Freightliner classie is covered by a three year warranty. Might want to find a Freightliner Oasis dealer to take it to . Let them know about your problem and it may throw a code about whats wrong . Your RV dealer is not who you should take it to ,only for the house .
__________________ 2000 Winnebago Ultimate Freedom USQ40JD, ISC 8.3 Cummins 350, Spartan MM Chassis. USA 1SG, retired;PPA,Good Sam Life member,FMCA. "We the people are the rightful masters of both the Congress and the Courts - not to overthrow the Constitution but to overthrow men who pervert the Constitution." Abraham Lincoln