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Keep getting P0088 code with SCT tuner???
I've got a 08 F450 CC, 4x4, DRW with cat/dpf delete, 5" magnaflow, banks CAI and an SCT tuner. Driving the truck around town is fine but as soon as I start pulling my 7k lb work trailer at 70-75mph down the highway I will blow P0088 code after 40 minutes or so. This first happened using the extreme tune so I put in the performance tune and all was fine. Now I continue to pull this code. And when it goes, the engine goes into some kind of default/detune mode. I lose my cruise control and the truck will not go over 63 MPH. The turbo pressure will not go over 1/2 the gauge when in this mode. If I turn it off and restart it's ok again for about 10 minutes and it goes back into the limp mode. Put it into tow mode and the same thing...
P0088 is fuel system rail pressure-too high.
Any ideas? Would a Spartan tuner fix this issue or does it need to go to the shop?
BTW I got nearly zero increase in fuel mileage with this setup on any tune. Quite a disappointment.