I chased O2 sensor & extended harness issues for a few months on my'13 with headers. The instant cure ( 3yrs ago) was Ford F150 Raptor O2 Sensors which come complete with longer, thicker Ford harness.
I chased O2 sensor & extended harness issues for a few months on my'13 with headers. The instant cure ( 3yrs ago) was Ford F150 Raptor O2 Sensors which come complete with longer, thicker Ford harness.
Don't the 11+ have factory widebands though? If so those can't be used with the 07-09 (and maybe 10?) since they use narrow band sensors.
What year GT500 do you have? I tried this on my 2007 and there was not a chance in hell it was going to work. I needed a good 20" of slack to reach my passenger side O2.