Rough running 6.0
 

Hello everyone I hope someone might be able to help me out. I've got a 2004 6.0 L f250 auto and it atcs like its missing every once and while. It seems to do it when it's at low rpm's when you go up a slight grade slowly. It seems to go away when you gas on it. I've pulled my livestock trailer all over Indiana this past month and it never does it while i'm towing. It started about a month ago after I changed the oil. I used a fram filter and motorcraft 15-40 oil. I thought it might have been the air filter so I changed that (stock). the only mod I've done is removing the muffler. I was thinking it might be the fuel filters. I'm going to change them this weekend and see what happens.

Sounds like a sticky injector. It happens. Start with two bottles of Rev-X and see if it goes away. I bet it does. Have you been running this same oil the whole time? I notice stiction more with certain oils believe it or not. Rotella seems to be the best in my truck. The worst I've used to date was the Valvoline premium blue 15-40, non synthetic. Truck ran noticably worse than the rotella 15-40 with 7k miles or so on it that I had just drained out. Went back to Rotella but using the T6 5w-40 now. I would highly recommend going with a full synthetic next time, really helps these trucks out due to the HEUI system.

No this is the first time I've run this oil. Funny I was told not to run rotela. I'll change the filters and run some injector cleaner. I'm guessing that's what rev-x is. Never heard of it but I'll look for it. At work we put auto trans fluid in to clean injectors on our big trucks. Thanks for the help. I'll post if it works.

Don't put any of that in. Rev-X is actually an oil additive, it goes in the motor oil. It helps the injectors tremendously since they're fired off of the oil. Stiction is basically when the spool valves inside the injector on the oil side stick and can't fire properly, the rev-x is just basically a lube for that.

Ok I understand that's why they are so finicky about the oil. I keep learning more and more about this engine. You've been more than helpfull. How well would Lucas be to put in good or bad.

I used it and noticed NOTHING. That was when I first got my truck and knew nothing about it. Then I read this test: http://www.jatonkam35s.com/DeuceTech...itive_test.pdf

and I realized Lucas was a huge waste of money. In the fuel side I run Opti-Lube products only, when I'm running diesel, otherwise it's 100% WVO. On oil side, good synthetic oil and rev-x occasionally.

Be sure to double check all of your harness to injector connections also.

experiancing the same thing with customers truck, got hima few bottles of the ford fuel additive, waiting to hear back something positive

Don't hold your breath on that. Never seen an improvement on anything running a fuel additive. You'd be better off trying rev-x, does a LOT more for the injector.

Where do you find rev-x at? I haven't been able to find it.