O/R X-Pipe No Tune

[Twin_Screwed_Cobra]

I'm planning on putting on this new mid-pipe and running it for a week or two before I get a custom tune for it in the mail. I know it will throw an engine light due to the missing cats but I wanted to ask will this make it run really rich or lean? I'm assuming it won't but I wanted to double check just to make sure. My A/F is something like 12.2-12.8 I believe with my current mods.

Thanks

 

[AbdullaGT500]

You'll be fine. Don't worry about it.

 

[NotQuik]

I ran one on mine for awhile with no tune a few years ago, as mentioned, it'll be fine.

 

[fdjizm]

You'll be fine for a while.
FYI There is also a feature going on that dumps some fuel to cool the non-existent cats, which will be turned off when you get an updated tune.

 

[KemahGT]

A quick search on Google gave me this. It's from a Mr. Bushi site but the hack will work for a 2006 GT. I stacked 2 on each downstream O2 sensor and the computer thinks the cats are still there. Good luck and happy motoring!

http://forums.evolutionm.net/evo-ho...k-plug-anti-foulers-remove-ses-cel-light.html

 

[jcw427]

It shouldn't be an issue short term. But I wouldn't run like that all season or anything.

 

[AK83]

You'll be fine, I ran offroad pipe without a tune for two weeks perfectly fine.

 

[Twin_Screwed_Cobra]

Just a little update:

Car feels a little down on torque and overall power (I'm hoping the new tune will fix this) and when I get on it I can smell a little gas as if it is running rich. I'm guessing that's due to the extra fuel being dumped for the non-existent cats? Not worried about it I'm just curious of what the smell is due to. I know it's not leaking because I've checked over everything several times.

 

[007GTCS]

Factory tune runs richer to cool cats, now that it doesn't have it, you will smell gas. Even with a new tune you are still going to have a little bit of that smell. It's the nature of the beast lol

 

[kylecm85]

I know it's a little different. But would this apply to Longtubes on a 5.0? I'm going to put some on but my tuners shop is about a hour from me. Will the factory wideband account for there being no cats?

 

[BAKnBLK2010]

Kyle, no tune required for long tube headers on your car. DO NOT USE THE O2 EXTENSIONS that come with the headers. You simply unhook the O2 wiring from the top of the trans and you will have enough wire to reach. You will need a tune to turn off the rear O2's if going catless.

 

[kylecm85]

Thanks for the info. Yeah it will be catless. Going to blankenship for the tuning. I'll remeber to not use the extenders. I have heard they cause issues.

 

[dugstang]

Catless def makes the exhaust smell...like 07grabr said. Its the nature of the beast. Ive ran catless on all my mustangs, its not that bad to deal with...unless you have cutouts.

 

[KatoS197]

Revive

I'm about to pick up some BBK cat delete pipes. I won't be able to get my hands on a tune for maybe a month or so. But due to the circumstances, I can't pass up the free BBK cat delete pipes and catback exhaust. I saw some folks said running a couple of weeks is ok. Anyone run longer than that?

 

[Aesthetics28]

Ur o2's are before the midpipe it won't affect anything but just a check engine line

 

[KatoS197]

Ur o2's are before the midpipe it won't affect anything but just a check engine line

There are two sets. Upstream before the cats and downstream after the cats. From what I understand the the ones downstream are to monitor the cats and make sure they're in working order. Deleting the cats will make the engine think that the nonexistent cats are running too hot and initiate COT. I just don't know if it's safe to run that for an extended period.

 

[Dino Dino Bambino]

Catless def makes the exhaust smell...like 07grabr said. Its the nature of the beast. Ive ran catless on all my mustangs, its not that bad to deal with...unless you have cutouts.

You could substitute the cats with a pair of small resonators. They'll absorb some of the sound and reduce the smell.

 

[07 Boss]

I'm planning on putting on this new mid-pipe and running it for a week or two before I get a custom tune for it in the mail. I know it will throw an engine light due to the missing cats but I wanted to ask will this make it run really rich or lean? I'm assuming it won't but I wanted to double check just to make sure. My A/F is something like 12.2-12.8 I believe with my current mods.

Thanks

If you are somewhere you need to get smogged you can build a couple of these and wire them between your front and rear sensors. They are basically homemade rear cat sims. Takes the signal from the front and steps it down to simulate that the cats are working. I wired these up and stuck them on my drive shaft loop mount, and passed my obd smog test.

 

[goodgollyjosh]

If you are somewhere you need to get smogged you can build a couple of these and wire them between your front and rear sensors. They are basically homemade rear cat sims. Takes the signal from the front and steps it down to simulate that the cats are working. I wired these up and stuck them on my drive shaft loop mount, and passed my obd smog test.

That's pretty slick man!

 

[Kylar]

If you are somewhere you need to get smogged you can build a couple of these and wire them between your front and rear sensors. They are basically homemade rear cat sims. Takes the signal from the front and steps it down to simulate that the cats are working. I wired these up and stuck them on my drive shaft loop mount, and passed my obd smog test.

Do you have a write up on this?