ran like crap on 1/3 Diesel, 1/3 ATF, 1/3 WMO

[broncobilly_69]

Anything you guys running the higher concentrations are doing to make it run right? It would often die when it was idling at stop lights and such. Other times it would idle fine. Topped off the tank with #2 and it smoothed right out.
Any suggestions would be greatly appreciated

 

[Ironman03R]

You either have a restricted fuel filter, weak lift pump or both.

 

[discbrks]

Is the fuel filter light coming on? If so I'd agree with Ironman03R.

 

[broncobilly_69]

must be the lift pump. I tried changing the fuel filter and that didn't solve te problem. Is there a way to test the lift pump?

 

[argve]

sounds like it could be the overflow valve.

see here http://dodgeram.info/tsb/1996/14-07-96.htm

If the overflow valve is bad here is one place you can get it for 60 clams http://www.tstproducts.com/browseproducts/Overflow-Valve-for-5.9-Cummins.HTML