5 ResultsMost relevantConsidering purchasing a 2003 Monaco Diplomat 40 PWD...My question has to do more with known issues in that model and year coach. Slide issues, trailing arm issues, engine issues, electrical, etc. It has a Cummins 8.9 litre 330 HP diesel engine with t...View results from repliesstarts fine, smooth idle 30secs, rough idle, then dies...usband cleaned out the fuel filter (there's only one) but its not the problem. Any suggestions would be greatly appreciated! Thanks!.View results from repliesTrailer Feels Heavier After Hauling for Period of TimeHey all. I have some ideas of what the problem could be, but I wanted to see if anyone else had a similar experience and might be able to offer some insights. I have an ’02 Chevrolet Avalanche 1...View results from repliesDPF System issues with 2013 Monaco by Navistar...iles. First year, no problems! Then in Dec 2015, the MIL lamp illuminated indicating a malfunction in emission system and that it needed to be checked out. Took it to an International svc center i...I'm going to do a 6.0 PSD engine swap!!!...ell, I just pulled the trigger on a 2008 E450, got it for $1,000! It's super clean. I will post pics soon. It will make a great donor vehicle, it has the newer front clip. There's just a slight problem...View results from replies