Jumoed O2 Sensors
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Road Captain
Joined: Nov 2009
Posts: 698
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Wanted to give y'all an update on what we found at the dealer today..........Big plug for Smokey Mountain Harley as they did everything to make things right.
I explained the situation and our upcoming three week trip to the Sales and Service Managers. Both guys were in agreement that the bike would more than likely have not ran right out west at the higher elevations, fouled plugs would have been a very real possibility. They also agreed that the O2 backyard jury rigged bypass job would have caused Harley to void and not honor my warranty if anything would have happened and could have been attributed to that modification.
The dealership hooked the O2 sensors back up the way they should be, removed the bypass hack, verified the ECM flash was in fact stock and double checked the O2 sensors as they were going to replace them at their cost if they were bad.
Everything looked and checked out good and they apologized that it had happened.......So as I said, a big thumbs up for Smokey Mountain Harley in Maryville, Tennessee.
Bike runs better now than it did so I believe hooking things up the way they should be is the correct route to take.
I explained the situation and our upcoming three week trip to the Sales and Service Managers. Both guys were in agreement that the bike would more than likely have not ran right out west at the higher elevations, fouled plugs would have been a very real possibility. They also agreed that the O2 backyard jury rigged bypass job would have caused Harley to void and not honor my warranty if anything would have happened and could have been attributed to that modification.
The dealership hooked the O2 sensors back up the way they should be, removed the bypass hack, verified the ECM flash was in fact stock and double checked the O2 sensors as they were going to replace them at their cost if they were bad.
Everything looked and checked out good and they apologized that it had happened.......So as I said, a big thumbs up for Smokey Mountain Harley in Maryville, Tennessee.
Bike runs better now than it did so I believe hooking things up the way they should be is the correct route to take.
Last edited by wndchsr2; Jun 9, 2013 at 02:42 PM.
Ultimate HDF Member
Joined: Jan 2013
Posts: 5,092
Likes: 2
From: Wenatchee, WA
by-the-bye. The O2 sensor is supplied with a D.C. voltage. Depending on the oxygen content of the exhaust emission the internal electrical resistance of the sensor changes. The result is that it drops more (or less) of this D.C. supply. The ECM polls this (returned) voltage and based on it's value applied to a look-up table, gates the fuel injectors more/less to maintain an optimum fuel/air ratio. HD sensors are mickey mouse. The resistor was chosen to provide a voltage drop that was D.C. mid range. The ECM would read this as good-to-go and NOT illuminate the engine light. With no O2 output default values are used but the ECM would throw fault codes. The purpose of the O2 sensor is for emission control.
Last edited by Assegai; Jun 9, 2013 at 03:24 PM.
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