Just installed a new Spectre CAI System and it caused the MIL to come on and P0171 & P0174 DTC's. It Has a high performance tune from SuperChips and Cat-Back Magna Flow dual 2 1/2" exhaust. I just purchased new plugs, DNA shorty stainless headers, a MAF from DNA, and a a new fuel filter that I have yet to swap out. Is there anything else I should plan to do, check, add, change, or modify before I get started? I want to make sure I have everything covered and all tbe parts before I start wrenching.
°Vehicle Details:
·2003 Ford F-150 SuperCrew Lariat 4x4
·5.4L 330ci SOHC 2v
·JEGS HD/Performance 4R70W Transmission
·Stock Low Stall Converter
·Spectre CAI
·MagnaFlow Cat Back
·6" Fabtech Suspension
·315/75R16 Goodyear MT/R on 16x10 Ultra ·MotorSports Aluminum Wheels
·SuperChips High Performance Tune
​·Interior/Exterior Full LED upgrade
·Clear Headlight Lenses
·Black out front side marker lens
·Smoked tail lights & 3rd brake light
·Custom Raptor Style Grill w/ "F-150"
.
in Black-Diamond Plate over Billet Grill instead of "FORD" over Honeycomb Grill
​​​​​°To Be installed:
·DNA Stainless Shorty Headers
·DNA MAF
·Platinum MotorCraft Plugs
·New Fuel Filter
°Near Future Mods:
·MSD Coil Packs
·Single Side exit 3" cat back flowmaster 44 Sys.
·Halo/HID & LED DTR lights (already acquired)
·New Gear Ratio from 3.55 to 3.73 or 4.10
·Swap LineX'ed Round Nerf Bars for Raptor Style Rocker Steps
·Raptor Coat Lower 1/2 of truck Possible 100% Raptor Coat Paint Job

2003 F150 SuperCrew Lariat 4x4 5.4L Triton V8- 6\" Fabtech Suspenion Lift on 315/75R16 & 16x10" Ultra Motorsports Aliminum Wheels

 

You need to get a CUSTOM tune to account for all those mods.

 

I installed a spectre CAI... honestly, it sucks.... fit and finish was crappy.... the emissions tube holes are in the wrong spot. etc

no DTC though, not sure why you are having issues. I do have a sct x4, but just run the canned 91 tune that comes with it. I also don't have mufflers.

have you adjusted your gear ratios to be running the 35s?

I run the same size tires, and my stock ratio was 3.55, but I have 4.56s now

2v 5.4l

I will be getting a different intake when I get my truck back together, the spectre sucks ( I might do the GOTTS mod, but put the CARB EO from the spectre on it)