I have been searching and reading every thread I can, but cant seem to find an answer to this one.. I have a 07 GT 4.6 5speed.. JL intake, Long tube headers, Catback Exhaust and 4:10 rear. I purchased the car which already had a custom tune in it. Ran fine. Previous owner did not have a clue about old stock tunes, etc... I got a stock tune from SCT to go to Inspection. OBDII says the O2 Sensor, O2 Sensor Heater, Catalyst Monitor and Evap Monitor all say incomplete. I drove the Ford Drive Cycle several times and they will not complete. I then got a custom tune from Doug at Bama which is an emissions tune, which should have let the OBDII monitors complete almost immediately.. No Luck. Still says Incomplete. No one seems to know what is going on here. Any advice would be helpful at this point.

 

When you loaded your new tune did you got back to stock first? My guess is that you didn't and now your new tune and old tune are mixing. Don't know if this is actually true or not, but i've seen people complain about a new tune and the problems came from not going back to stock first.

 

Well, Kind of.. Remember, the car had a custom tune when I got it and the previous owner had no idea about anything... So, I got a Bone stock tune directly from SCT which they manually installed into my X3 as the stock tune. We then used that to return to stock. It all started there. That would not let the OBDII complete. I then stored the new emission tune from Bama in the X3 and uploaded that. No good either. Doug sent me another tune just to make sure nothing was corrupted. Same deal. The OBDII just wont complete. I could try to go back to stock, then re-install the new emission tune again.. Don't think thats the problem..

 

Thanks for the reply.. How do you like the Whipple SC? I'm considering a blower once I get this mess worked out.

 

The supercharger is great. Every 4.6 mustang owner should have FI added to their car in my opinion, its how Ford should build them. Why don't you have a Ford dealership reflash your car to stock then start from there. I don't know if it'll work, but its where I would start.

 

That sounds about where you might need to go with this.
It doesnt have to be a Ford dealer, but it might be hard to find a repair shop that does pcm flashing. Ours does thankfully.

dumb question, but you do have the rear o2 sensors installed?

 

The rear O2 sensors are turned off in the tune. That alone will give you 3 of the 4 'not ready' OBDII test states. Make sure you have rear cats (or an appropriate simulation using simulators). The tune can be adjusted so that the rear O2 tests are enabled, and you'll be able to get those to show up as 'Ready' during inspection.
[I ran into this same issue with my first custom tune, the rear sensors were off!]

The Evap may be off in the tune, too, but if not, you'll need to let the car sit overnight (actually, at least 6 hours), and run it normally.

 

Thanks for the info. I did just test a different "performance" tune and the test does show as ready. It does set DTC's though, but I expected that. So I believe you are right. It appears that the O2 sensors are shut off in the emission tune, but enabled in the performance tunes. Kind of backwards. I have emailed the tuner and hopefully this will be it. Thanks again.