Ok, thanks 4 the helpful hint about the fuel filter. Changed it already. Also I went and spent more money at a shop and they replaced the fuel shut off valve on the injection pump. Help for about 4 days and went back to cuttin off again. it's kinda of weird. someday it will run all day.then the next day it will crank and get 2miles from the house and starts acting up. Don't Know? I've replace everything that i can think of accept the fuel pump and the injection pump. Vacumn test and votage test was normal. did what it was supposed to do. STUCK?
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Check fuel pressure, should be no less than 4 psi. The fuel transfer pump is located on frame rail under drivers door, If fuel pump is bad replace it. If that doesn't solve your problem, you may have a bad injection pump. Please rate
I am an apprentice and could not guarantee this is your solution but i have seen this problem more then once and all three times it has resulted in replacing the injector pump! this is very costly but a known problem for the 6.5L.The first thing i would do is pick up a good quality fuel filter. Replacing it is very easy and will never hurt! Just remove the grey cover that says 6.5L on the top of the engine, there will be a housing (that looks not much bigger then the new filter you picked up) using filter pliers (or by hand if not to tight) remove the threaded retainer ring and housing cover. Inside you will see fuel (diesel) and the filter. Simply remove the old one and replace with the new one. Ensure no dirt or debris gets inside, clean the cover and put it all back together! This is a great place to start because it is very inexpensive and easy to do!