I was thinking to myself the other day that if the O2 sensors are disconnected when running a pcv can the ecm compensate for big changes in altitude. For instance the plains of Oklahoma to Denver. Any thoughts?

 

No, it can not compensate because it has no way to know it needs to compensate.

 

the PCV would use the sensors in the intake to calculate air density and changes whether altitude or temperature.

and use the data in the "maps" to calculate fuel injector pulse width ( how much gas to allow)



the o2 sensors are used after combustion to determine if complete combustion has occurred so not directly related to the OP's question about altitude compensation.


I use another method which retains the o2 sensor data



normal day-riding for Arizona riders will see huge changes in elevation...1100' in Phoenix, 7000' at Flagstaff just a few hours ride away.

mike

 

Yes, as mentioned there is a sensor that measures airflow in the intake, and should be able to compensate. However, if at all in doubt, e-mail powercommander. I've e-mailed them for recommended maps and they have been very helpful and knowledgeable, not just telling me WHAT I should use but also WHY.

 

That is exactly the reason that I opted to integrate the AutoTune with my PCV. I didn't want to stay with a static tune and map. If a guy is going to travel the mapping system has got to be dynamic to keep things running right. So far, I have been extremely satisfied with this setup on mine.

And, by the way,,,,,GO POKES!!!!!!!

 

My 11 King runs great at 9K feet west of Denver all the way to sea level. with the PCV.

 

Air density in the intake charge is no guarantee that you aren't running lean. Only an 02 sensor can tell you that.

 

Yes your ECM will continue to compensate for altitude with the PC-V and O2 eliminators installed. The Delphi ECM is a speed density system, it uses modeled airflow along with feedback from MAP and IAT sensors to accurately calculate air density and fuel delivery requirements.

 

Ok, for those of us who are technically challenged....I have a PC-V from FM on a 2012 Ultra Classic with the O2 sensors disconnected from the ECM (no eliminators). I live in Florida and had a custom map done here...just about as sea level as you can get. If I ride up to the Smokies and get up to 5,000+ feet will I get any adjustment or will I still be working with the settings on the same static map at just above sea level?

PS..am not hijacking, just re-stating the OP's question a different way

 

The ECM is continually adjusting fuel delivery based on calculated air density and modeled airflow. The map itself does not change nor does it need to. Yes, you could ride from FL to CO and the ECM will adjust, however note at higher altitudes while the tune may not change performance is reduced due to conditions.