FBFG2 Base Calibrations

by Michael Decipha Ponthieux
Posted: 9-18-2014
Last Updated:

What is the FBFG2 - AMZ3 / SYM3 / EKO3 ?

The FBFG2 Base Calibrations, are theoretical stock calibration for most all 1999 - 2004 Ford ecu's created by decipha. This base calibration is adjusted for highly modified naturally aspirated and boosted engines including: turbocharged, supercharged, and nitrous, as well as bone stock factory engines. These base calibrations can be used on MOST ALL of the following:
99-04 Mustang GT/V6/Cobra / Crown Victoria
99-03 F-150 / Harley-Davidson / Lightning
99-04 Navigator / Blackwood / Continental / Town Car
99-04 Grand Marquis / Marauder

These tunes are highly modified by decipha for use with the FBFG2 strategy and can replace the following:

Hardware Codes

If you are new to tuning or just want to follow along and not be lost, here is the link to the Getting Started Write Up.


The following are the absolute MINIMUM changes REQUIRED before starting your vehicle utilizing the FBFG2 Calibrations.
XTALHPSECU Clock SpeedMost important variable in the ecu, this must match your ecu clock speed either 3.0 or 4.0 dependent upon your specific ecu
SARCHGCubic Inch DisplacementInput your actual engine size or scaled percentage if applicable (CLICK HERE FOR SCALING)
FN 036IMAF TransferInput your actual MAF flow data from your flow sheet or your scaled percentage
ALOSL, AHISLInjector SlopesInput your injector's manufacturer's recommended values if available or scaled percentage
Fuel_BKPTInjector BreakpointInput the injector manufacturer's recommended fuel breakpoint or scaled percentage
FN 367WInjector OffsetInput the manufacturer's recommended voltage offset values
FNPWCOM_HSDeltaP High Slope Multiplierinput your inj manufacturers recommended multiplier values
FNPWCOM_LSDeltaP Low Slope Multiplierinput your inj manufacturers recommended multiplier values
FNPWCOM_BKDeltaP Breakpoint Multiplierinput your inj manufacturers recommended multiplier values
FNPWCOM_OFSDeltaP Offset Multiplierinput your inj manufacturers recommended multiplier values
FNRF_SSFFFuel Pump Voltage Tableinput your fuel pump manufacturers recommended values
FN 2200Borderline Knock TableSee note below. Populate this table with adequate values for your specific engine combination.
FN 035Load ScalingPopulate the Y-axis with your engines expected peak N/A load values (when not in boost), DO NOT PUT IN MAXIMUM LOAD VALUES WHILE IN BOOST
FN 1036BPCT_LoadPopulate this table with your engines expected Load at various TPREL and RPM conditions. This table will directly affect the engines driveability and must be dialed in manually.
FN 1350Crank PW Multiplierfirst two columns should be dialed in to fastest fire-off (typically 3 to compensate for larger displacement engines with small injectors or a value of 0.5 for larger injectors on smaller engines)
AC_RLY_IS_NCA/C Relay State0=normally open, 1=normally closedMost 99-01 GTs will be set to 0, some cobras 1 including some crown vics and trucks
VID_RT_AXLERear End Axle Ratiotypically 3.27 stock, some OEM 3.55s and 3.73s on trucks and performance vehicles
AXLE_RATIO_IAxle Ratio Integerset to 4 for 4.10 or 4.56 rear ends, set to 2 for 2.73 rear ends
AXLE_RATIO_FAxle Ratio Fractionalset to 55 for 3.55 rear gear, set to 10 for 4.10, 73 for 3.73 or 2.73
CHT_SNS_HPCylinder Head Temp Sensor Presentset to 1 for crown vic and trucks that have a CHT sensor, be sure to set ECT_SNS_HP to 0
PFE_HPEGR Presentset to 0 DPFE or 1 SONIC to enable EGR if you have one present
NLMTHI_0Neutral Rev Limiter 0This is the 2 step RPM rev limit
KNK_SENSOR_HPKnock Sensors Presentset to the number of knock sensors you have present
OSS_PULSE_REVOSS Teethshould be set to 12 for 5spd transmissions, 6 for most 1999-2003 4r70w trans
PATS_DISABLEPats Disableshould be set to 0 to re-enable PATS once you've copied your PATS code over
TIRE_REVTire Revs per Mileshould be dialed in to make your speedometer 100% accurate

The FBFG2 base tunes have been setup to enable the 2 step rev limiter, the engine will step at the set RPM while the vehicle is not moving.
Overheat protection shuts off the engine when your engine temp exceeds 240 degrees and allows approx 15 seconds of run time after restart so you can move the vehicle if need be, thats done with FN1362X and FN1361X, do not change the last column values or the scaling for either of those tables
If you do not have injector data for your injector's, read the FUEL Write Up for more details.
The FBFG2 timing tables are setup for 24 degrees of timing @ 80 load for bone stock 1999-2004 2-valve engines.

For engines with aftermarket heads, its typical to reach loads of 100 and greater, increase the ENTIRE TABLE (ALL CELLS)
by the difference of MBT spark at 3k+ subtracted by 24 degrees (current value in tune at 80 load),
MBT reference can be found HERE

For example: If you have Trickflow 44 heads [MBT=25 degrees] add 1 degree to the table (25 - 24 = +1)
if you have a 4 valve B/C heads [MBT=27 degrees] add 3 degrees to the whole table (27 - 24 = +3)
these adjustment are a general ballpark adjustments, you are still REQUIRED to adjust individual cells while tuning.

Features of the AMZ3 / SYM3 / EKO3 - Base Calibrations

Simplified Timing to only the Borderline Spark Table and ACT Retard Function (divide values by 10 for actual spark retard amount, ex: -50 = 5 deg retard)
Simplifed Fueling Logic to the Load Scaling Function FN035, set this for the highest load when NOT IN BOOST.
Overheat protection will shut the engine off when it gets too hot, will also allow a restart time of approx 15 seconds during an overheat
The overheat protection is incorporated in the base fuel and startup fuel tables last column values and column scaling function.
FN320A has been added to the calibrations to allow overheat protection to function, FN320A should force OL at 0 load at high ECTs.
LEAVE THE LAST COLUMN OF THE BASE FUEL TABLE AND STARTUP FUEL TABLE ALONE, this is done to cause the engine to shut-off during an overheat.
The stock base fuel table FN1360B is set as a WOT Fuel Multiplier on base fuel, unlike stock FBFG2 tunes.
The KAMRF Min Clip at WOT will not allow negative fuel corrections at WOT, only positive corrections for safety.

Other Variables

Although many other values exist in the ECU which can be adjusted to resolve other issues, they are not what I consider to be ABSOLUTELY REQUIRED. In short, the variables listed above are the most important variables in your calibration. For Nitrous engines, I am working on custom n2o code and will hopefully roll it out some time in the foreseeable future.


Obviously you still tune as you would otherwise, the FBFG2 base tunes are just to get you on your way much easier and faster, one is still required to dial in Fuel, Air, and Spark just as you would otherwise.

As with all EFIDynoTuning tunes, be sure to read over the Pre-Tuning Information. The Initial Tune Instructions and Post Tune Instructions apply as well.

Download - FBFG2 Definition File for TunerPro RT (XDF) - ON HOMEPAGE
Download - FBFG2 Stock Tunes 256k for TunerPro RT - ON HOMEPAGE

For tuning support visit the support forum.

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