Harley-Davidson Electronic Fuel Injection TunerUser’s Manual

Software Updates for Closed LoopOperationVersion 4.5 See Calibration Document for current calibration updates. Other interim revisions are covered in the online help documentation Allowed the software to recognize FLHXi vehicles. Model Year 2006 vehicle changes include a new throttle body and injectors, and closed-loop fuel controlon Dyna EFI models.Closed-Loop OperationBackground2006 EFI Dyna models come equipped with 2 “switching” sensors also known as stoichiometricsensors. Unlike wide-band sensors which can measure and control over a wide AFR range (10-20),switching sensors can only control within a narrow range ( /- 0.5 AFR). This offset in control isaccomplished with the EFI Race Tuner by adjusting the Closed-Loop Bias table.Closed-loop operation is only used when the engine is in a normal operating condition. There areseveral instances when the ECM goes into open-loop operation. These include: warm-up, high load orhigh RPM operating conditions (such as WOT), when the vehicle is in Hot Engine Management, or anytime the AFR requested is richer than 14.6. Data Mode has also been updated to read and record properClosed-Loop parameters for proper tuning.There is also a new Data Type when recording on bikes with O2 sensors. This is listed as‘Engine with O2 Data’ under the ‘Data Type’ pull-down menu. To record O2 sensor data follow theinstructions below.1. Open Data Mode2. Select Record Data from the File pull-down menu.3. Click ‘Accept’.4. Name your recording and save.5. In the ‘Data Recording Control’ dialog box select ‘Engine With O2 Data’ from the ‘Data Type’pull-down menu.6. Minimize the ‘Data Recording Control’ dialog box.7. The main Data Mode window will now list and record the following closed-loop data items.a. VE New Front. This is the new calculated VE for the front cylinder that the ecm useswhen running closed-loop.b. VE New Rear. This is the new calculated VE for the rear cylinder that the ecm useswhen running closed-loop.c. O2 Integrator Front. This is an error value for the front cylinder.d. O2 Integrator Rear. This is an error value for the rear cylinder.e. O2 Sensor Front. This is the milli-volt reading of the front O2 sensor.f. O2 Sensor Rear. This is the milli-volt reading of the rear O2 sensor.

Tuning with Closed-LoopOnly calibrations that are closed-loop capable can be used for closed-loop operation. When acalibration is opened in Tuning Mode, a box in the upper right region of the screen will indicate if acalibration is intended for open or closed-loop operation.The AFR table controls the operating conditions in which the ECM will enable closed-loop. TheAFR cell must equal 14.6 for the ECM to enable closed-loop operation. This allows the user to control ifand when the bike is in closed-loop simply using the AFR table.For tuning of the VE tables, the recommended method has not changed. The AFR table shouldbe set to 13.2 in all cells; this will put the bike into open-loop operation. The VE tables are then tuned toachieve the 13.2 in all conditions. Upon completion, the AFR table should be returned to its previoussettings. This will return the bike to closed-loop operation.The new table that has been added this year is the Closed-Loop Bias table. This table is used toshift the AFR richer or leaner during closed-loop operation. This table is a function of engine speed andmap load. The cell values are the switching voltage that the ECM controls to. A lower voltage will controlleaner, and a higher number controls richer. This table is used by the ECM in addition to the AFR table todetermine what AFR to control to.Example: Using calibration 141NX001. Looking at 1750 rpm and 40 kPa, the AFR table shows14.6 and the Closed-Loop Bias table shows 447mV. With these values, the ECM will be in closed-loopoperation and will control to approximately 14.4. In order to change the fuel delivered to the engine in thiscondition, the Closed-Loop Bias table would be used. 500 mV will make the mixture slightly richer, and400 mV will make the mixture slightly leaner.Changes to the Closed-Loop Bias table are done for the same reasons the AFR table would bechanged: power, fuel economy, knock, etc.3

Table of ContentsModel Year 2006 Software Updates. 2Table of Contents . 4Introduction. 7Kit Contents . 7Disclaimer & Warnings . 7How to Use This Manual – 1.1. 8First – Read the Introduction to Harley-Davidson EFI Systems. 8Second – Glance Thru the User’s Manual. 8Third – Get Comfortable With the Tuning & Data Mode Programs. 8Fourth – Use this Manual as a Reference Tool . 8Introduction – 2.1. 9Harley-Davidson EFI Systems . 9How It Works . 9Harley-Davidson Electronic Sequential Port Fuel Injection System, (ESPFI) . 9Current ESPFI Components. 9Overview of How the Harley-Davidson ESPFI Functions . 11Heat Management System . 13Installing Software – 3.1 . 15Equipment Needed. 15Installation of Screamin' Eagle EFI Tuner Software . 15Getting Started . 15Overview of Software Programs . 16Tuning Mode Programs (Basic & Advanced). 16Data Mode Program . 17Basic Tuning Mode – 4.1. 18Opening Tuning Program & Selecting File . 18Tuning Modes & Limits . 19Menu Bar Functions. 20Load & Save Tuning Files . 21Printing Tuning Tables . 22Programming ECM . 23Edit File Comments & Part Number . 27Select Display Colors. 28Main Fuel Table . 29Main Spark Table. 313-D Graph . 33ECM Tuning Constants Window . 34Advanced Tuning Mode – 5.1. 35Opening Tuning Program. 35Tuning Mode & Limits . 36Menu Bar . 37Load & Save Tuning Files . 39Printing Tables . 40Program ECM . 42Edit File Comments & Part Numbers . 45Select Display Colors. 464

Air-Fuel Ratio Table . 47VE Front/Rear Cylinder Table . 48Spark Advance – Front/Rear Cylinder Table. 49Warmup Enrichment Table . 50Cranking Fuel Table. 51Idle RPM Table . 52IAC Warmup Steps Table . 53ECM Tuning Constants Screen. 54Accel Enrichment Table . 55Decel Enleanment Table. 56Table Comparison Commands . 572-D & 3-D Graph Screen. 58Data Mode – 6.1 . 59Introduction to the Screamin' Eagle EFI Race Tuner Data Mode. 59Sophisticated On-Board Data Acquisition. 59Data Organized in Frames . 59Main Display Table. 59Graphing Display. 59Three Mini-Programs Provide Professional Performance Comparison . 60Manual Format . 60Launching Program & Opening Data Files. 61Data Mode Basics. 62Main Display Descriptions. 64Status Bit Names . 66Playback Control Center . 67Graph Control . 68Recording Data Files . 70Printing Data Record. 75Exporting Data Files. 76Enter/View Comments . 78DTC Code . 79Time to Distance Estimator . 80Quarter Mile Calculator .