55 reviews
Content rating
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About this app

Tune your Harley-Davidson® with your Android!

Fuelpak® FP4 from Vance & Hines makes your Android one of the most powerful flash tuners available. You've already selected the best exhaust system for your Harley, now complete the package with the Fuelpak FP4 for optimized performance.
With this app and the required hardware you can:
- Download dyno tuned maps specific for your bike/pipe combination
- Adjust individual parameters in your fuel and spark tables
- AutoTune your bike
- Read and clear Diagnostic Trouble Codes
- View live sensor data

At any time, if you need assistance tuning your Harley, you can upload your map to a Vance & Hines Customer Service Representative for review and download the recommended changes.

("Harley-Davidson" is a registered trademark of Harley-Davidson Motor Company.)
Updated on
May 10, 2023

Data safety

Safety starts with understanding how developers collect and share your data. Data privacy and security practices may vary based on your use, region, and age. The developer provided this information and may update it over time.
No data shared with third parties
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No data collected
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Ratings and reviews

53 reviews
Pat Clifford
May 11, 2023
So far, it works. It takes several tries to connect the phone and FP4. But once it connects, it seems to work. I've done "auto tune" three times, so far. I'll update this when I'm done. I had an FP3 and it worked perfect. Sadly the FP3 is gone. Up-date: After two software updates FP4 is worse than before. It often takes so long to connect the phone to the FP4 that the bike is hard to start. 1 in 5 times, I give up. If it works, DON'T FIX IT.
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June 21, 2022
Junk. Simply expensive junk. Constantly freezes. Can't change any of the parameters it claims you can. Every time I try to run auto-tune it just looses connection then freezes. Try to load a map and it freezes right after its done and has to be completely restarted. The app says it can't tune for aftermarket cams or engine work, yet tech support says "before I purchased it" that yes absolutely it can tune cam upgrades. Which is it?
14 people found this review helpful
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wolfman Mather
May 25, 2022
Since the first update I lost autotune function in the process of using autotune, just gone from the menu screen. There is no options for optimizations such ads decel pop or throttle progression as advertised. Non of the sensor data is accurate for hp,torque, fuel consumption and the app is constantly freezing up. I have to back out of the app and go back in. Loading the app functions is slow.
11 people found this review helpful
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What's new

FP4 keeps getting better. With this release, more adjustability is available for all users. Be sure to check out the Map Optimization section.
We also fixed a few bugs.
Thank you for using FP4.