Loss of power after 2 hours of driving

[SSchirmers]

Sorry tdr members I do not have a clue as to what I am doing so please forgive me. Now the problem. I have A 95 dodge diesel with 6o,000 miles on it This has happened to me 4 times so far. If I drive It about 150 miles in temps of about 90 degrees or more and at speeds of about 70 mph the truck will start to shake and fall on its face no power. After about 10 seconds it will clear up for about 15 seconds. This will go on till I exit the freeway and when I get up to the stop sign it will die. It will then start again A little slow but it does start Does any body have any ideas. The truck runs great in town and this has happened on 4 different tanks of fuel and I have no water.

 

[illflem]

My '95 has done the same thing on isolated occasions. I finally figured out it wouldn't do it with more than half a tank of fuel. I think what may be causing it is hot fuel weakening the overflow valve spring causing low fuel pressure from the lift pump. Mine would do it even on a winter day, but always on extended drives at 70+ usually going uphill when the fuel got below half. This has been a mystery problem for me for 6 years now, I went to several dealers while the truck was under warranty, none could find a problem. Lift pump and shutdown solenoid were replaced under warranty, still did it. I have posted here several times but have never got a decent answer. Thought I had it licked with a new overflow valve but it happened again 6 months later. All filters are clean and there are no leaks. My solution has been to keep the tank more than half full, it will never do it then. Whenever I try to make it do it it won't. If you figure it out let me know.

 

[SSchirmers]

I hope I am doing this properly. I know I posted this in the wrong group topic area but bear with me. I have owned this truck for only 6 weeks and it does not matter if the tank is full or not. The dealer is not any help as that is where the truck is now

 

[Deezul1]

Check this web site, they desribe your symptoms very closely, who knows it might be the answer and if it is please let us know.



http://www.preporator.com/Cummins_5.9L.htm

 

[Shooter]

Originally posted by SSchirmers

The dealer is not any help as that is where the truck is now

repeat after me... . The dealer is not my friend...

That was good now again The dealer is not my friend... . good



Take it to Cummins.

 

[Little Bill]

Next time it does it, open the fuel tank fill cap and see if it sucks in air. May be a plugged vent.