Join Date: Jul 2008
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Low fuel mileage and no answers
Alright, you can see my mods in my signature and I can't get more than 12 mpg. And for the last few months its been like 10. I got like 8 pulling a 5000 lb camper from chicago to Billings, MT running Vivian's tow agressive. Not sure how much it matters but i have the VXCF4 strategy that PHP prefers. Also, the truck is a manual transmission. and on 285 65 18's and the tune and revs per mile are calibrated correctly.
Ive checked brakes and hubs, they are all loose and free and everything spins very easily.
I just ran down the highway at 80 for 30 miles and my turbo did stick and I had like 1-2 PSI for 5 miles until it freed up and then it ran at 10ish PSI at about 42% engine load. EBP was at 160kPa and manifold pressure stayed right with it while the VGT was stuck, and then when the turbo freed up the ebp would stay roughly 20-30 kPa higher than the manifold pressure. Does this seem like normal levels, and does it seem like an appropriate relationship between the 2? If i floored it it would hit mid 20's PSI with no problem (when the VGT wasn't stuck).
Any idea's what I have going on? Is it just the turbo even though usually it doesn't stick (noticeably)? Or do i just not notice that the turbo is sticking a little all the time and that's killing MPG?
Any advice on keeping the old strategy or updating to the current one?
I don't know enough to figure this out, any help would be great.
2006 F-350 CC LWB 4x4 manual.
ARP'S, iTSX (tuned by Vivian), Silverline Turboback, Full Force Diesel 155cc injectors, EGR delete, Barder Stage 1.