2010 F350 running inconsistantly - Tuned
Need some help on this one. Its kinda got me stumped.
2010 F350. 62,000 Km. Spartan tuned. Stock tires. The truck is in immaculate condition.
I pull a 38' toyhauler. Weighs about 17,000# loaded.
Usually, the truck pulls great. Although, I am not totally happy with the 3.55 gears(wouldnt reccomend them to anyone pulling heavy).
What I am noticing is the truck will pull great for 30- 90 min and then it turns into a total dog!
When it is running good, it will pull my trlr up certain grades in high gear and makes 41-43lbs boost in the 210 tow performance. The EGT's dont exceed 1200-1250.
When it starts $hiting the bed it will only make 35- 38lbs of boost and will sometimes have to unlock the converter to make the same hill. The EGT's also go up to 1400. It has a tough time pulling the trailer across the flats in high gear!! It sounds like it is running good but just wont pull. This thing is also a pig on fuel when i am pulling compared to my 08.
I have tried the 210 early lock up, 210 late lock, and both 210 tow performance. I dont think it has anything to do with the tuning.
I have scanned for codes and nothing came up.