2010 Touring O2 SENSORS:UNPLUGGED : V-Twin Forum: Harley Davidson Forums

TOMCENTRAL · 10-27-2009, 02:03 AM

I see the instructions for the Powercommander(PC) made for the 2010 Touring bikes tells you to just disconnect the O2 sensors to allow the PC to function properly.I find this very interesting.D&D & others sell pipe & Hi-flo A/C combos & claim that don't need a tuner.My question:What would happen if you just unplugged the 2010s O2 sensors on a stock bike or a bike with the D&D combo?What would the AFR be w/o the sensors being connected? Regards,Tom

msocko3 · 10-27-2009, 06:52 AM

Quote:

Originally Posted by TOMCENTRAL

I see the instructions for the Powercommander(PC) made for the 2010 Touring bikes tells you to just disconnect the O2 sensors to allow the PC to function properly.I find this very interesting.D&D & others sell pipe & Hi-flo A/C combos & claim that don't need a tuner.My question:What would happen if you just unplugged the 2010s O2 sensors on a stock bike or a bike with the D&D combo?What would the AFR be w/o the sensors being connected? Regards,Tom

Don't know what the AFR would be but I do know it would throw codes and run like sh!t.

RoadyRudy · 10-27-2009, 07:31 AM

Quote:

Originally Posted by TOMCENTRAL

I see the instructions for the Powercommander(PC) made for the 2010 Touring bikes tells you to just disconnect the O2 sensors to allow the PC to function properly.I find this very interesting.D&D & others sell pipe & Hi-flo A/C combos & claim that don't need a tuner.My question:What would happen if you just unplugged the 2010s O2 sensors on a stock bike or a bike with the D&D combo?What would the AFR be w/o the sensors being connected? Regards,Tom

Yep, if the ECM doesn't have the O2 sensors plugged in it will throw a code...
The earlier PC's have O2 eliminators that that plug into the sensor wires and "fool" the ECM into thinking that the O2 sensors are still there. The way I understand it, on the 2010 version of the PC you simply unplug the connector wire to the O2 sensor and the PC unit itself "fools" the ECM into thinking that the O2 sensor is still there. Thus "eliminating" the "eliminator" :-)

Sure, you can absolutely put on pipes and an A/C and the ECM will control the AFR and timing to a certain degree and the bike will "run". ( Determined by Mr. EPA/ECM) Or, YOU can control it by using a tuner, ie a SEST, TTS, PC, ....etc. AND if tuned properly, your bike can run cooler with more HP/Torque. You may loose a few mpgs, but you'll smile more....

bvr.com · 10-27-2009, 12:49 PM

I had the PC V installed before I took delivery last Friday and my 103 runs great with the O2 sensors disconnected...matter of fact it starts pulling like crazy from about 2500 on up...

I am considering adding the V&H Power Duals and throw it on the dyno, once I get a few more miles on it...B

TOMCENTRAL · 10-27-2009, 02:11 PM

Quote:

Originally Posted by bvr.com

I had the PC V installed before I took delivery last Friday and my 103 runs great with the O2 sensors disconnected...matter of fact it starts pulling like crazy from about 2500 on up...

I am considering adding the V&H Power Duals and throw it on the dyno, once I get a few more miles on it...B

You could run the 09 powerduals(cheaper,around $340 shipped) since the o2s are disconnected & use the o2 bungs for dyno tuning then,plug em.Regards,Tom

TOMCENTRAL · 10-27-2009, 02:11 PM

Quote:

Originally Posted by msocko3

Don't know what the AFR would be but I do know it would throw codes and run like sh!t.

Did you try this?

TOMCENTRAL · 10-27-2009, 02:13 PM

BTW,the ecm stores a soft code but doesn't cause a lite with the PC.Regards,Tom

strokerjlk · 10-27-2009, 03:55 PM

Quote:

What would happen if you just unplugged the 2010s O2 sensors on a stock bike or a bike with the D&D combo?What would the AFR be w/o the sensors being connected?

If I understand your question...... here goes hope it makes sense
the ECU is trying to acheive 9.77-10.01 lamda or 14.7 (2010 is lamda based) in the closed loop cells of the map. and what ever the ECU is calling for in the open loop cells. from what I have seen on pre 2010's is when the sensors are unhooked it tries to get to the target AFR. This was with sert and twin scan data logging on my personal bike. (07) the AFR was all over the place though rich as 12.5 in open loop and lean as 15.4 in the cells that were calling for 14.6 (closed loop) so I would assume with the stock ECU (no tuner key map being installed ) It would try to acheive the same targeted AFR or Lamda of the stock map. but it would have the same results lean in some areas and rich in others.
as far as codes my 07 didnt throw any codes with them unhooked.It ran like sh*t and I didnt leave them unhooked very long.......as I was just playing around to see what happened.
I have heard of others throwing codes when unhooked.
just wasent the case on my test.

I came to the conclusion that without the sensors hooked up. it was lean in the closed loop cells because it didnt have the voltage to switch or run the sensors so the ECU didnt know to add fuel to keep it in the 14.2-15.4 range that the closed loop bias table would be capable of doing.

bvr.com · 10-27-2009, 03:57 PM

Quote:

Originally Posted by TOMCENTRAL

You could run the 09 powerduals(cheaper,around $340 shipped) since the o2s are disconnected & use the o2 bungs for dyno tuning then,plug em.Regards,Tom

Tom...no difference, that you know of, 09 to 010 Power duals? Sometimes there are little corrections, enhancements, etc, that no one tells you about...maybe its just me being an*l thou...thanks.

Brad

stinkboto · 10-27-2009, 04:32 PM

Quote:

Originally Posted by TOMCENTRAL

You could run the 09 powerduals(cheaper,around $340 shipped) since the o2s are disconnected & use the o2 bungs for dyno tuning then,plug em.Regards,Tom

Could you tell me where to find those powerduals for $340?
I could only find them for about $100 more. Thanks

BVBOB · 10-27-2009, 04:53 PM

2010 has a smaller diameter 02 sensor, as for the 07's throwing a code, they will code after a certain(not sure exact time) running at cruise or approximately 50 KPA, even if you take the afr map out of closed loop by lowering the numbers from 14.6(closed loop trigger) the code will eventually set if the sensors are unplugged. Even though they are not incorporated into the tune and fuctional they still need to be left in place or an 02 elimator, which is only a 1 Meg resistor must be installed to keep the check engine light off.

TOMCENTRAL · 10-27-2009, 11:27 PM

Quote:

Originally Posted by stinkboto

Could you tell me where to find those powerduals for $340?
I could only find them for about $100 more. Thanks

Saw em on Ebay.Priced from around $340 & up to msrp.I quess V&H had a ton of em & gave special deals to folks that bought large quanities.Remember the Power duals came out for the 09s & now Harley has changed the o2 sensors which caused a surplus.Regards,Tom

TOMCENTRAL · 10-28-2009, 12:47 AM

Quote:

Originally Posted by stinkboto

Could you tell me where to find those powerduals for $340?
I could only find them for about $100 more. Thanks

http://cgi.ebay.com/ebaymotors/Vance...#ht_500wt_1182

msocko3 · 10-28-2009, 07:43 AM

Quote:

Originally Posted by TOMCENTRAL

Did you try this?

Have done it on a car and it was ugly, goes to reason a bike won't be much better.

TOMCENTRAL · 10-28-2009, 11:06 AM

Quote:

Originally Posted by msocko3

Have done it on a car and it was ugly, goes to reason a bike won't be much better.

I was talking about a 2010 harley davidson with the new style O2 sensors.Since DynoJet recommends unplugging them with their PC,I wanted to know if they could be unplugged w/o the PC.Jamie answered my question.Thankz,Tom