O2 sensors
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Road Captain
Joined: Jul 2008
Posts: 671
Likes: 19
O2 sensors
hi bought a 2nd hand dyna fatbob and was hoping someone can answer a question the bike is a 2009 has vance and hine short shots thunder monster baffles hd heavy air breather and vance and hines fuel pak the bike runs good but a bit of popping on deceleration.I noticed the O2 sensors are in the pipes do most guys keep them connected or do they remove them when they put a fuel controller on?Looked at the plugs and look a little on the lean side to me.thanks for the help
Road Master
Joined: Nov 2010
Posts: 1,115
Likes: 69
From: Bay Area, NorCal
from OP: "... bought a 2nd hand dyna fatbob and the bike runs good but a bit of popping on deceleration."
You picked a great bike - congrats! One thing you might look at are the header pipe flange nuts. If they haven't been snugged up in a while there could be some leakage causing the popping you are hearing - only takes a minute to check and doesn't cost you anything. Hope you get it worked out.
~
You picked a great bike - congrats! One thing you might look at are the header pipe flange nuts. If they haven't been snugged up in a while there could be some leakage causing the popping you are hearing - only takes a minute to check and doesn't cost you anything. Hope you get it worked out.
~
Ultimate HDF Member
Joined: Apr 2008
Posts: 5,384
Likes: 12
From: Out on Deranged
short shots are known for popping. I've never had a fuel pak so I don't know how it works with O2 sensors or not. You should give vance and hines a call to find out. Alternately FuelMotoUsa offers 100 to 150 cashback for trading in any fuel tuner. Best bet give them a call they will get you on with someone and you might even get your answer about the fuel pak from them.
Tourer
Joined: May 2012
Posts: 465
Likes: 2
From: Beaverton, OR
hi bought a 2nd hand dyna fatbob and was hoping someone can answer a question the bike is a 2009 has vance and hine short shots thunder monster baffles hd heavy air breather and vance and hines fuel pak the bike runs good but a bit of popping on deceleration.I noticed the O2 sensors are in the pipes do most guys keep them connected or do they remove them when they put a fuel controller on?Looked at the plugs and look a little on the lean side to me.thanks for the help
Ultimate HDF Member
Joined: Feb 2009
Posts: 5,132
Likes: 228
From: Garland, TX
If the plugs look on the lean side, you might consider a set of xieds from nightrider.com. You can see the mods done to my bike in my signature and I still get a little popping on decel. I kinda like a little popping on decel, it sounds cool 
Road Captain
Joined: Apr 2013
Posts: 583
Likes: 4
From: australia
fuel pack is a v&h product too use on their pipes. they don't like to mixed with other pipes, some after market units are adjustable , try a you tube search, FOR top performance and tuneabillity you need some thing like a dyno jet that your maps can be tunned for indavigull bikes... Back fireing can be a bit removed by running a bit rich,, Most causes are air leaks at muffler joins/exhaust flange,, ads too character,
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