Looking at a PC III and notice that it includes a Dynojet O2 sensor eliminator. What exactly does this do and why? I want to have an exhaust system custom built but was worried about the O2 sensors. Will this eliminate that problem? Want to make my bike run better not worse.

 

It does exactly what it says - eliminates the O2 sensors from the EFI loop and still allows you to tune your bike for the setup you have. Jakeiniraq has a lowrider with big radius pipes that were dealer installed. They plugged the holes for the O2 sensors when they did the install. He has a PCIII and obviously has the O2 eliminator option and, as far as I know, his bike runs great.

 

I havea TFI, and it bypasses the O2 senser as well. Bike runs great.

 

I have the PCIII and 02 eliminator. No problems yet. Plan on having it Dyno tuned this spring.
Smiley

 

what's the benefit of eliminating the o2 sensors from the closed-loop system?

 

Don't know the benefit other than some aftermarket and/or custom pipes aren't drilled for O2 sensors and you can use the eliminator to get around that.

 

i've wondered about that. why not have holes drilled for them instead of removing them from the equation and then fooling the system and compensating with an aftermarket tuner rig that tells the computer they are there?

i've only read good things about the delphi system,


just chatting. interesting topic.

 

hmmr, that is exactly what I was wondering.

 

when i recently researched/purchased the exhaust for my scootie a big priority was they had to have the o2 bungs

i think the true closed loop system is a great advance for this motor!

 

The stock ECM looks for a signal from the o2 sensors, if it does not receive that signal it will throw an error code and the bike will not run well at all. The o2 eliminators provide that signal and the ECM thinks that all is wonderful with in the little world that it rules. The PC III can then modify the ECMs signals to its hearts content and manage the engine control according to the map that you have loaded in to the PC III. I can certainly be wrong but I am under the impression that the current Delphi system on the Harleys is not a true closed loop system, I think that it is a partial closed loop system that goes closed loop only under certain conditions. The rest of the time it operates in open loop.

Arcane