Join Date: Apr 2007
Feedback Score: 0 reviews
2003 - 6.0 running rough
This will be long and drawn out, my apologies, but I want to provide as much detail as I can. I have a 2003 F-350 with the 6.0 engine in it. I have the superchips tuner. The truck has 112,500 miles on it. I typically pull a 31 ft Jayco fifth wheel weighing in at about 13,500 lbs.
We had just returned from a 1000 mile round trip vacation pulling the camper, a couple of days later on the way to work the truck was running very rough, almost seemed like it was going to die on the spot. I read the codes; it was throwing P0261 Cylinder I Injector Circuit Low and subsequently one code for each cylinder. I re-chipped it back to ecomomy mode from tow safe mode. This seemed to help some.
I had to pull the camper 2 days later back to dealer, so I re-chipped it back into Tow Safe mode and we dropped the camper off, the truck ran fine, I decided to re-chip it back to economy mode. Once that was completed, the next time I started the engine, the battery light came on and stayed on.
I made the 75 mile trip home, but the next morning the truck would not start, I charged up the batteries (which are 1 year old) and took the truck (barely would run at all) to my mechanic where upon he replaced the alternator (2nd one in 6 months).
Now it is running better, but when you first crank and run it; it smokes and runs very rough. It feels as though it is not breathing properly, or not firing right, like water in a gas engine. I have not had an opportunity to make a longer trip in it to see if once it warms up it runs any better. Currently it is not throwing any codes.
Any ideas as to what to check before I take it to my dealer for help?