Cummins 5.9 12 valve mechanical expert

rseibenick · 09-06-2022, 12:32 PM

Looking for help with my 1994 RV motor home with the Cummins 5.9 12 valve mechanical engine. Having issues after driving for 2hrs or more , going up even small hills.. RPM,s drop as I go up from 2200-2000-1750-1500.Few seconds later RPM goes back up then down again. OK on level roads and going down hill. Would like to talk to some and give them more info . I was at INDY for the big go and towed a enclosed trailer. Thanks.

09-06-2022, 12:32 PM	#1
rseibenick Member Join Date: Dec 2002 Posts: 160 Likes: 22 Liked 20 Times in 7 Posts	Cummins 5.9 12 valve mechanical expert Looking for help with my 1994 RV motor home with the Cummins 5.9 12 valve mechanical engine. Having issues after driving for 2hrs or more , going up even small hills.. RPM,s drop as I go up from 2200-2000-1750-1500.Few seconds later RPM goes back up then down again. OK on level roads and going down hill. Would like to talk to some and give them more info . I was at INDY for the big go and towed a enclosed trailer. Thanks.