Vance & Hines Fuelpak FP4
What the FP4 phone app does for supported Harley-Davidson motorcycles and what to verify first.
Maps and live sensor data
The FP4 connects to the data port on supported Harley-Davidson motorcycles and uses a phone app to flash maps to the factory ECU. Its instructions cover map selection, AutoTune sessions, and viewing live sensor readings.
The live sensor screen is useful for observing what the bike is reporting. If your goal is to compare two rides in a spreadsheet, check whether your specific app and setup can export the channels and file format you need.
How to read the AutoTune instructions
Vance & Hines documents collecting data in sessions and applying the recorded adjustments in the app. Read the instructions for your exact part number and keep a record of the map you began with. AutoTune workflows differ across brands and products.
Check the part number and map coverage
- Match the FP4 part number to your exact model year, motorcycle, and connector.
- Check for a map appropriate to your intake and exhaust setup. Ask the manufacturer about builds outside the available map descriptions.
- Confirm the phone requirements and whether the device has already been paired or licensed to a motorcycle if buying used.