Fuel Pack Adjustment
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Road Captain
Joined: May 2008
Posts: 569
Likes: 1
From: Delaware, OH
Fuel Pack Adjustment
Read once before that someone had recommended a adjustment on one of the fuel pack settings that helped remove more of the exhaust pop. I have done searches and can't find it??
My wifes FXDF has v&H short shots with V&H Quiet Baffles. I am even getting pops between shifts.
Anybody have any ideas?
My wifes FXDF has v&H short shots with V&H Quiet Baffles. I am even getting pops between shifts.
Anybody have any ideas?
Tourer
Joined: May 2008
Posts: 456
Likes: 0
From: Marion, Ia
You need to figure out what version of the software is on your fuel pak, the new one I think is 12, cuts all fuel to the cylinders when you let off the throttle, it gives you a little engine break sensation since it basically turns the motor into a big air pump, but it effectively eliminates the pop. Check Vance and Hines fuel pak website to figure out witch version you have, Also decel pop can come from other reasons that should be investigated to rule out, such as an exahust leak. Hope this helps you...
http://www.fuelpakfi.com/harley1.html
2. My Exhaust Is Popping When I Am Slowing Down or Between Shifts
The version 12 software in your fuelpak greatly minimizes this popping. Your software version level can be checked in mode 20. Older versions can be upgraded for a nominal charge by contacting our technical service department.
The version 12 software is able to cut down on this popping by monitoring the throttle position in relation to the engine rpm; if the fuelpak was not calibrated to the throttle position correctly in mode 19, popping or other driveability issues can result. Check the throttle calibration in mode 21 – the numbers should read zero at idle and start increasing smoothly as the throttle is twisted, reading about 50 at half throttle and 99 at full throttle. If the numbers do not appear to be correct, recalibrate the throttle in mode 19.
Some riders do not completely roll off the throttle between shifts or when coasting to a stop. This riding style can lead to exhaust popping. Be sure to fully roll off the throttle.
Exhaust leaks can also cause popping. Check and tighten any leaking exhaust joints.
Lastly, some exhaust systems will pop and there is nothing you can do to completely eliminate it. Systems with large baffles or with open or non-existing baffles are especially prone to popping.
http://www.fuelpakfi.com/harley1.html
2. My Exhaust Is Popping When I Am Slowing Down or Between Shifts
The version 12 software in your fuelpak greatly minimizes this popping. Your software version level can be checked in mode 20. Older versions can be upgraded for a nominal charge by contacting our technical service department.
The version 12 software is able to cut down on this popping by monitoring the throttle position in relation to the engine rpm; if the fuelpak was not calibrated to the throttle position correctly in mode 19, popping or other driveability issues can result. Check the throttle calibration in mode 21 – the numbers should read zero at idle and start increasing smoothly as the throttle is twisted, reading about 50 at half throttle and 99 at full throttle. If the numbers do not appear to be correct, recalibrate the throttle in mode 19.
Some riders do not completely roll off the throttle between shifts or when coasting to a stop. This riding style can lead to exhaust popping. Be sure to fully roll off the throttle.
Exhaust leaks can also cause popping. Check and tighten any leaking exhaust joints.
Lastly, some exhaust systems will pop and there is nothing you can do to completely eliminate it. Systems with large baffles or with open or non-existing baffles are especially prone to popping.
Last edited by BIGDADI; May 9, 2009 at 11:16 AM. Reason: Wrong link had to fix
Tourer
Joined: May 2008
Posts: 456
Likes: 0
From: Marion, Ia
If you have version 12 you could try and lower number 23 If you increase it, it returns fuel to the cylinders on deceleration so if you lower it, it should take fuel away right?
http://www.fuelpakfi.com/harley1.html
"To eliminate exhaust popping on deceleration, the Fuelpak will turn off the fuel going into the cylinders. If this feeling is undesirable, you can raise the number in mode 23."
http://www.fuelpakfi.com/harley1.html
"To eliminate exhaust popping on deceleration, the Fuelpak will turn off the fuel going into the cylinders. If this feeling is undesirable, you can raise the number in mode 23."
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