Jumoed O2 Sensors
Elite HDF Member
Joined: Jul 2008
Posts: 4,741
Likes: 45
From: Indian Land, SC
Now if I could only make that chart bigger to see the writing..............
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Road Captain
Joined: Nov 2009
Posts: 698
Likes: 13
I could also see these jumpers being a reason for Harley to deny a warranty claim since the system has been rigged apparently.
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Road Captain
Joined: Nov 2009
Posts: 698
Likes: 13
If I came across as a smart a@@ in my response to you.......I apologize as that was not my intent. You were offering a suggestion which is what I asked for.
Seasoned HDF Member
Joined: Sep 2009
Posts: 25,310
Likes: 2,446
From: Eastern NE
Most definitely and the dealership needs to fess-up because I'm sure they were well aware of these jumpers (hard to miss). How many miles are on the bike?
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Road Captain
Joined: Nov 2009
Posts: 698
Likes: 13
However they are supposed to go over the bikes they take in but I dont think this one got that inspection.
Stellar HDF Member
Joined: Dec 2009
Posts: 2,561
Likes: 280
From: North Cental Iowa
Is the plug hooked into the line going to the sensors or the sensors themselves? The pic looks like the O2 eliminators that come with a PCV, the previous owner may have had done a stage 1, air cleaner & pipes, & used a PCV as the tuner. See what your dealer has to say & hook the O2s back up & see how it runs before you go on your trip, the O2s have very little to do with the tuning for elevation change, more a duty of the MAP sensor. I really don't think you'll have a problem either way.
Supporter
Joined: Jul 2007
Posts: 2,196
Likes: 10
From: Shenandoah, TX
I was told by my dyno guy yesterday, that some people disconnect the O2 sensors to gain better fuel mileage. Doesn't explain the resisters though.
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Outstanding HDF Member
Joined: Aug 2009
Posts: 2,858
Likes: 217
From: Puyallup Wa.
The o2 sensors are not going to make it run good in colorado..... Go over vail and its going to spark knock been there done that. Joe is right dont mess with it before a long trip.
Road Warrior
Joined: Oct 2008
Posts: 1,692
Likes: 22
From: Denham Springs, La
If the bike had a PC tuner on it the jumpers could possibly keep the ECM from throwing codes for "Open O2 sensors" or something like that.
The jumpers could be, as you say a home made "tuner" like an xied.
Either way, removing the resistors and plugging the O2 sensors back in should return everything to stock as neither the PC or XIED modify the ECM.
If you have the stock ECM make the dealer confirm it hasn't been modified or just make them flash it to stock configuration.
The jumpers could be, as you say a home made "tuner" like an xied.
Either way, removing the resistors and plugging the O2 sensors back in should return everything to stock as neither the PC or XIED modify the ECM.
If you have the stock ECM make the dealer confirm it hasn't been modified or just make them flash it to stock configuration.