I installed a set of Kooks headers and hi-flow cats on the boss over the weekend and got codes p0420 and p0430. Do I need to get a tune to fix this or are there MIL eliminators I can run? Im running the trackey so its dumping fuel and I suppose the aftermarket cats cant handle it. I dont want to cut the harness and install resistors.

 

Turn off your rear O2 sensors in your tune.

 

Yep, just get a tune for the headers and the high flow cats. All will be well. Or just get rid of the cats entirely and turn the sensors off via tune.

 

Be nice if I could just turn off the sensors while keeping the trackey tune running. From what ive read the problem came from when I got stuck in traffic idling for about 5 minutes. Just too much fuel was dumped and the cats couldnt keep up. Ive also heard that with Jason Lund's ghost cam tune you're not supposed to run cats. I really want them there for emissions BS and to help quiet down the side pipes a bit.

Anyone used those "3 custom tunes" that come with the tuner from American Muscle?

 

What size Kooks mid lengths and did you have any fitment issues?

 

1 7/8" with 3" h-pipe. Only issues was just the size of them trying to get them into position.

 

Not sure how strict the emissions testing is where you live, but in my neck of the woods (Oregon) you won't pass emissions with hi-flow cats ... they take care of the raw gas smell, but they don't remove enough of the pollutants to pass. YMMV.

 

The only test we have to pass here is a visual check and then a readiness code check. My 5.0 doesnt have emissions parts. I didnt want to have the hassle of trying to inspect the boss like I have had with the 5.0.

Not to mention I was hoping the hi-flows would keep me from having to have it tuned for the rear o2s. On my brother's car he ran MIL eliminators for a while and then had it tuned. He spent $600 for a tune years ago. I didnt want that expense but I guess its turning into a domino effect.

 

From what I've read you can't have the track key and tunes installed. MIL eliminators don't exist for the new cars.

 

[QUOTE=Boss_Hotrod;8016355]Jason Lund's ghost cam tuneQUOTE]

Correction for you... Jon Lund !!!!!