Not being used to diesel, I misread the tach. I am used to x1000 on a car tach and it was x100. So it idles at 2000rpm and hardly moves no matter what speed.
I am planning to go to a diesel shop this week to have them look at the air pressure loss overnight and do a thorough check out of belts, hoses, etc. They should be able to tell what is wrong with the tach too.
John & Deanie, Corky and Benji (best buddies)
2001 National Marlin 390 DP
"Try to live up to your dog's opinion of you."