I just purchased a used 07 FLHTC from a dealer and started checking it out when I got home. It has stock exhaust and where the O2 sensors go in the headers there are plugs. I pulled the seat and both side covers and I dont see an EFI tuner of any kind. Near as I can tell everything looks stock. Is there a way to bypass the O2 sensors? What should I be looking for? Did all 07's come with O2 sensors?

Thanks,
Bogey

 

Yes, you should have O2 sensors. I'd guess that there is a PCIII hidden in there somewhere.

 

Sounds like the sensors have been removed.
The only unit that I'm aware of that eliminates the sensors is the Power Commander. If that's the case you should find the ends of cables with eliminators attached. The standard mounting position for a PC on 07 touring bikes is under the right side cover.

 

Would not be unusual for the previous owner to remove the PC and take off the eliminators also.

 

That's a strong possibility. The other thing I can think of that uses O2 eliminators is the DFO or Techlusion TFI. It goes by a couple of different names. It's a device that goes inline between the ECM and fuel injectors. Typically it's a small box that would be under the seat in the spot at the base of the tank. There would be wires that plug in to the injectors under the tank. You should be able to see the eliminators plugged in to the original O2 sensor wire though.

 

Thanks for the advice 07RoadHawg. I'm gonna lift the seat again and check out those connectors and look for eliminators after work today.

 

He'd be throwing codes though, wouldn't he? If the PCIII and the eliminators had been removed and the O2 sensors not been replaced?

 

I'm not getting any codes and I think the thing runs great so I'm guessing it has the O2 sensor eliminators and some type of tuner. Does a PCIII replace the computer or piggyback onto it? And I would guess it would have a label of some kind so I could ID it. Everything looks stock MoCo under the side covers. I'm not bitching, just would like to know what I got.

 

I had a Dobeck/Techlusion DFO in my 97 E'Glide. I know how they hook up. Didn't see any evidence of one of those either. BTW I thought they worked great. Like tweaking a carburetor.

 

A PC piggy backs and on 07's instructions were to mount int right on top of the ECM which is behind the right side cover.