got 'er all updated and installed< didnt touch the tire size n she was pretty peppy on level 2, got in and changed the tire size to 33.6 n she stuttered on accelleration n some misfiring, so changed it back to stock (think it was 29.6)
she's runnin' pretty good on level 2 but still has the putter/backfire...
any thoughts?
and would the cal ecm be the hex? RXCM6E7
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2005 F150 FX4 5.4l 3v 
2" AS level, 18x9 Cannon's 5" bs, 305/65R18 Falken Wild Peaks
Gotts mod, 2-1/2" true dual with x pipe and dual magnaflows 3" tips
JVC KW-HDR710, Polk db571's, Subordnance M1500 amp, JL 10W1v2-4 10" sub
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