Why can't I get a straight answer? - Road Glide Forums
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post #1 of 11 (permalink) Old 06-13-2014, 05:38 PM Thread Starter
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Why can't I get a straight answer?

It's very interesting talking between HD dealers and Power commander on whether you need the O2 sensors installed, removed, need the eliminators, need wide band optimizers? PC said if the O2 sensors are still installed the PC doesn't actually do anything. I was also told by many it doesn't matter. Then others said you don't need the eliminators, but PC says you do need the wide band optimizers/eliminators. I don't know what is right or wrong anymore, and wondering if anyone can give me the real deal? PC seems to point to HD, and HD seems to blame PC. HD wants to sell SERTs I'm sure, and PC wants to make sure they aren't getting bad wrap for a bike that runs like crap. So, does leaving the O2 sensors installed negate the PC operation? If you unplug the sensors, should you install the wide band eliminators? Maybe the auto tune is worth the cash and solve all this crap! I wouldn't think a dyno tune is needed for slip-ons and a high flow AC. Thanks!


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post #2 of 11 (permalink) Old 06-13-2014, 06:18 PM
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I had the PC V on a dyna a few years ago. The O2 sensors were unplugged for it. It didn't matter if you left them installed. They weren't hooked up, just filled a hole. I'm sure they have changed it since then but listen to DynoJet. They are the ones you are getting maps from and their instructions should be followed.

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post #3 of 11 (permalink) Old 06-13-2014, 06:27 PM
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Unless you use autotune with the pcv you do not connect the O2 sensors there is a cap for the plugs. Ran my streetglide for years without the sensors connected on the pcv. I rode lots of elevations (sea level to mountains) and temps with no issues. Just make sure your map or tune is accurate.

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Last edited by rg_dave; 06-13-2014 at 06:30 PM.
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post #4 of 11 (permalink) Old 06-14-2014, 06:15 AM
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Yes unplug them. I left mine plugged in at first and had issues. Unplugged them and now much better.

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post #5 of 11 (permalink) Old 06-14-2014, 01:43 PM
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Depends on what you are trying to do. I leave the 02 sensors alone with my power vision.
It works better with them for my type of riding. If you are going to run 4000-6200 RPMs and beat the hell out of ,yes remove the 02 sensors and tune for it.
By removing the 02 sensors you doing away with the closed loop for the most part.
Not the best option if you really ride the bike but if you want to race it the way to go.
Straight as it can get.
SERT done right is better than PC if you want to go fast.


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post #6 of 11 (permalink) Old 06-14-2014, 04:01 PM
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If you intend on dyno tuning your bike better to leave o2 in.
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post #7 of 11 (permalink) Old 06-14-2014, 05:12 PM
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Quote:
Originally Posted by smitty901 View Post
Depends on what you are trying to do. I leave the 02 sensors alone with my power vision.
It works better with them for my type of riding. If you are going to run 4000-6200 RPMs and beat the hell out of ,yes remove the 02 sensors and tune for it.
By removing the 02 sensors you doing away with the closed loop for the most part.
Not the best option if you really ride the bike but if you want to race it the way to go.
Straight as it can get.
SERT done right is better than PC if you want to go fast.
The PC V doesn't use the O2 Sensors. The PV does use the O2 sensors.

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post #8 of 11 (permalink) Old 06-14-2014, 06:52 PM
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Here is the short of it ~

Autotune PCV ~ Widebands
PCV - None
PV - Widebands

Reality is the narrow band only read 14.1 to 15.2

Widebands can see the whole range we are interested in.

Stock tunes are basically at 14.7

A little lean in my book.

I have ridden over 250k with PCV and Autotune ~ IMHO a great combo ~ change cams ~ Ride, Accept Trims, Send Map ~ yes that simple. Changed cams, heads and multiple other components and dialed it in with the PCV & Autotune. Powercommander has some great videos on you tube.

Even the maps do not matter with autotune, you are tuning to an AFR and can reel it in over miles. I was unsure of the tune in my bike with the 110 Stage III & Sert, so I 0 mapped the PCV and reeled in the tune with the AFR's and the autotune.

This is not rocket science, remember your tuner uses widebands to tune your bike ~ So what does that tell you?

~Road Glide The only way to Fly ~
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post #9 of 11 (permalink) Old 06-16-2014, 10:46 AM
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The straight answer can be found right in the Dynojet installation instructions for your Power Commander. On Power Commander equipped bikes the O2 sensors need to be disconnected/bypassed or the product is not going to work properly. A quick explanation is if the O2's are left connected the PC is trying to tune around a moving target. On the other hand if you are using Dynojet Power Vision, you will leave the factory O2's connected as we are now controlling the ECM and how it uses O2 feedback. Hope this info helps

Jamie Long / Fuel Moto USA

Dynojet Power Vision info is here
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post #10 of 11 (permalink) Old 06-16-2014, 04:05 PM
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Listen to Jamie ( Fuel Moto )...........
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