Deciphering the Fuel Pak Project
Cruiser
Joined: Jul 2013
Posts: 186
Likes: 5
From: Hamilton
Thanks for this thread guys. I had a stumble off of idle. Did the mode 1,2 +3 and runs rock solid now. Took it for a good blast yesterday and its good to go.
2003 Duece FXSTDI
V&H 2/2 Big Radius
Screamin Eagle Heavy Breather
Cheers
2003 Duece FXSTDI
V&H 2/2 Big Radius
Screamin Eagle Heavy Breather
Cheers
Deciphering the Fuel Pak Project
Anyone will tell you that the worst part about owning a Fuel Pak is the lack of end user adjustments. Even after getting 'dialed in' blindly by phone or email, many of us believe that there could still be room for improvement. The problem is, inherently it's very difficult to translate the feel of minor changes through a conversation on the phone.
The intent here is not to create a database for making bold adjustments to completely circumvent Vance and Hines tech support, but rather to gain an understanding of the values in order to fine tune these baselines.
Collectively we should be able to build a record of what each mode controls. Here's what I propose: those of you with a Fuel Pak please chime in with your experience in tuning of the product. I have already put together some information which I have gathered from various forums, so that will be the starting point. If you have any additional info/corrections please include that as well.
Example post:
"I had an off idle stumble, so the tech had me increase the values in mode 1 and mode 2 by 3, which resolved the problem."
This is ideal because it indicates tuning issue, modes affected, amount of change, and the result.
Example description:
"1. idle fuel, throttle lag (-), off idle stumble (+)."
This translates to Mode 1 controls idle fuel. If you are having throttle lag/hesitation decrease this value. If you are have an off idle stumble then increase this value.
Mode Descriptions
1. idle fuel, throttle lag (-), off idle stumble (+)
2. idle fuel, throttle lag (-), off idle stumble (+)
3. idle fuel
4. idle fuel
5. <1/4 throttle fuel, throttle lag (-)
6. 1/4 --> 1/2 throttle
7.
8.
9.
10. cruise speed fuel 50mph 1/4 --> 1/2 throttle, highway stumble (+)
11. cruise speed fuel 60mph
12. cruise speed fuel 70mph
13.
14.
15.
16.
17. idle a/f ratio
18.
19. throttle cal
20. version
21. throttle cal test
22.
23. fuel cut/injector shunt at 0 throttle, decel popping (-), stalling (+)
Please note, I am not responsible for any damages that may occur for running values not recommended or suggested by Vance and Hines. Thank you all in advance for your input.
Anyone will tell you that the worst part about owning a Fuel Pak is the lack of end user adjustments. Even after getting 'dialed in' blindly by phone or email, many of us believe that there could still be room for improvement. The problem is, inherently it's very difficult to translate the feel of minor changes through a conversation on the phone.
The intent here is not to create a database for making bold adjustments to completely circumvent Vance and Hines tech support, but rather to gain an understanding of the values in order to fine tune these baselines.
Collectively we should be able to build a record of what each mode controls. Here's what I propose: those of you with a Fuel Pak please chime in with your experience in tuning of the product. I have already put together some information which I have gathered from various forums, so that will be the starting point. If you have any additional info/corrections please include that as well.
Example post:
"I had an off idle stumble, so the tech had me increase the values in mode 1 and mode 2 by 3, which resolved the problem."
This is ideal because it indicates tuning issue, modes affected, amount of change, and the result.
Example description:
"1. idle fuel, throttle lag (-), off idle stumble (+)."
This translates to Mode 1 controls idle fuel. If you are having throttle lag/hesitation decrease this value. If you are have an off idle stumble then increase this value.
Mode Descriptions
1. idle fuel, throttle lag (-), off idle stumble (+)
2. idle fuel, throttle lag (-), off idle stumble (+)
3. idle fuel
4. idle fuel
5. <1/4 throttle fuel, throttle lag (-)
6. 1/4 --> 1/2 throttle
7.
8.
9.
10. cruise speed fuel 50mph 1/4 --> 1/2 throttle, highway stumble (+)
11. cruise speed fuel 60mph
12. cruise speed fuel 70mph
13.
14.
15.
16.
17. idle a/f ratio
18.
19. throttle cal
20. version
21. throttle cal test
22.
23. fuel cut/injector shunt at 0 throttle, decel popping (-), stalling (+)
Please note, I am not responsible for any damages that may occur for running values not recommended or suggested by Vance and Hines. Thank you all in advance for your input.
Advanced
Joined: Jul 2013
Posts: 78
Likes: 0
From: Ontario
I've had it on my bike since I got it used, caused nothing but problems. Ended up having it disconnected (it's still physically attached to the bike). Upon disconnecting it I soon found that my stuttering issue was caused completely by the fuelpak and that was with numbers straight from VH. Looking elsewhere.
Advanced
Joined: Jul 2009
Posts: 50
Likes: 0
From: Mass
I've had it on my bike since I got it used, caused nothing but problems. Ended up having it disconnected (it's still physically attached to the bike). Upon disconnecting it I soon found that my stuttering issue was caused completely by the fuelpak and that was with numbers straight from VH. Looking elsewhere.
You really should call VH, explain your situation. I had a few hiccups when I first installed mine, I called, told them what was going on.. they came right back with a couple of settings to change. It runs perfect now....
Stage IV
Joined: May 2012
Posts: 4
Likes: 0
From: South Jersey
Madchemist24 - are you still running the fuelpak with blackouts and hi flow intake? I have the same setup and was only told to increase mode 23 to 50. Now I'm thinking of going with your numbers that you posted.
Cruiser
Joined: Sep 2012
Posts: 129
Likes: 1
From: Florissant
Deciphering the Fuel Pak Project
Anyone will tell you that the worst part about owning a Fuel Pak is the lack of end user adjustments. Even after getting 'dialed in' blindly by phone or email, many of us believe that there could still be room for improvement. The problem is, inherently it's very difficult to translate the feel of minor changes through a conversation on the phone.
The intent here is not to create a database for making bold adjustments to completely circumvent Vance and Hines tech support, but rather to gain an understanding of the values in order to fine tune these baselines.
Collectively we should be able to build a record of what each mode controls. Here's what I propose: those of you with a Fuel Pak please chime in with your experience in tuning of the product. I have already put together some information which I have gathered from various forums, so that will be the starting point. If you have any additional info/corrections please include that as well.
Example post:
"I had an off idle stumble, so the tech had me increase the values in mode 1 and mode 2 by 3, which resolved the problem."
This is ideal because it indicates tuning issue, modes affected, amount of change, and the result.
Example description:
"1. idle fuel, throttle lag (-), off idle stumble (+)."
This translates to Mode 1 controls idle fuel. If you are having throttle lag/hesitation decrease this value. If you are have an off idle stumble then increase this value.
Mode Descriptions
1. idle fuel, throttle lag (-), off idle stumble (+)
2. idle fuel, throttle lag (-), off idle stumble (+)
3. idle fuel
4. idle fuel
5. <1/4 throttle fuel, throttle lag (-)
6. 1/4 --> 1/2 throttle
7.
8.
9.
10. cruise speed fuel 50mph 1/4 --> 1/2 throttle, highway stumble (+)
11. cruise speed fuel 60mph
12. cruise speed fuel 70mph
13.
14.
15.
16.
17. idle a/f ratio
18.
19. throttle cal
20. version
21. throttle cal test
22.
23. fuel cut/injector shunt at 0 throttle, decel popping (-), stalling (+)
Please note, I am not responsible for any damages that may occur for running values not recommended or suggested by Vance and Hines. Thank you all in advance for your input.
Anyone will tell you that the worst part about owning a Fuel Pak is the lack of end user adjustments. Even after getting 'dialed in' blindly by phone or email, many of us believe that there could still be room for improvement. The problem is, inherently it's very difficult to translate the feel of minor changes through a conversation on the phone.
The intent here is not to create a database for making bold adjustments to completely circumvent Vance and Hines tech support, but rather to gain an understanding of the values in order to fine tune these baselines.
Collectively we should be able to build a record of what each mode controls. Here's what I propose: those of you with a Fuel Pak please chime in with your experience in tuning of the product. I have already put together some information which I have gathered from various forums, so that will be the starting point. If you have any additional info/corrections please include that as well.
Example post:
"I had an off idle stumble, so the tech had me increase the values in mode 1 and mode 2 by 3, which resolved the problem."
This is ideal because it indicates tuning issue, modes affected, amount of change, and the result.
Example description:
"1. idle fuel, throttle lag (-), off idle stumble (+)."
This translates to Mode 1 controls idle fuel. If you are having throttle lag/hesitation decrease this value. If you are have an off idle stumble then increase this value.
Mode Descriptions
1. idle fuel, throttle lag (-), off idle stumble (+)
2. idle fuel, throttle lag (-), off idle stumble (+)
3. idle fuel
4. idle fuel
5. <1/4 throttle fuel, throttle lag (-)
6. 1/4 --> 1/2 throttle
7.
8.
9.
10. cruise speed fuel 50mph 1/4 --> 1/2 throttle, highway stumble (+)
11. cruise speed fuel 60mph
12. cruise speed fuel 70mph
13.
14.
15.
16.
17. idle a/f ratio
18.
19. throttle cal
20. version
21. throttle cal test
22.
23. fuel cut/injector shunt at 0 throttle, decel popping (-), stalling (+)
Please note, I am not responsible for any damages that may occur for running values not recommended or suggested by Vance and Hines. Thank you all in advance for your input.
So if I'm running lean then do I go up or down on the numbers? And do you adjust by one or two or like 5 or ten? Right now I have m5 and m6 at 35 and 25. And m10 m11 m12 I have at 15, 10 and -6.
Stage II
Joined: Jan 2016
Posts: 2
Likes: 1
From: Kentucky
Mode 22 will show live RPM when running
Mode 18 set to 2 gives you 23 Modes Dyna and Softail
Mode 18 set to 32 gives you 33 Modes, Mode 34 and 35 are n/a Dyna and Softail
Mode 18 set to 33 gives you 35 Modes Touring
Mode 18 set to 2 gives you 23 Modes Dyna and Softail
Mode 18 set to 32 gives you 33 Modes, Mode 34 and 35 are n/a Dyna and Softail
Mode 18 set to 33 gives you 35 Modes Touring
HD Forum Stories
The Best of Harley-Davidson for Lifelong Riders
7 Surprising Harley-Davidson Products that Are Not Motorcycles
Verdad Gallardo
8 Best Harley-Davidson Motorcycles Ever
Pouria Savadkouei
10 Worst Harley-Davidson Motorcycles Ever
Pouria Savadkouei
Killer Custom's Jail Break Is The Breakout That Refused to Blend In
Verdad Gallardo
Crazy Bunderbike Build Looks Amazing, But Is It Impossible to Ride?
Verdad Gallardo
Harley-Davidson Reveals Super Cool Cafe Racer Concept
Verdad Gallardo
Engraved Rebellion: Inside Bundnerbike's Glam Rock II
Verdad Gallardo
10 Motorcycles You Should Never Buy
Joe Kucinski
10 Things Harley-Davidson Needs to Fix in 2026
Verdad Gallardo
Stage III
Joined: Aug 2016
Posts: 3
Likes: 1
From: Arizona
Just installed a v&h Fuelpak on a 2003 RK. Mods are :thunder headers 2into 1, SE air Kit and stage one download. Got it dialed in using fp#0489. V&h gave me updates: mode 2,3,4=7, mode 23=50. The bike runs awesome! FYI
Vinny
Vinny
Tourer
Joined: Oct 2016
Posts: 297
Likes: 19
From: Central CA
Recently called V&H Fuel Pak support.
The lower end fuel pack that must stay connected to the ECM does not use the output from the O2 sensors.
The higher end fuel that can be disconnected once the ECM is flashed, does use the output from the O2 sensors.
This O2 sensor thing could have a major influence on tunning, since the stock setup uses output from the 02 sensor.
The lower end fuel pack that must stay connected to the ECM does not use the output from the O2 sensors.
The higher end fuel that can be disconnected once the ECM is flashed, does use the output from the O2 sensors.
This O2 sensor thing could have a major influence on tunning, since the stock setup uses output from the 02 sensor.