Anybody running O2 Plug Defoulers?

[bruning6]

This is great info. I am in the middle of this same issue. I purchased a N54 that I later found out had catless DPs (no no I wasnt mad). So now I am working on getting it through emission inspection. A fellow 1addict has advised me that he has got catless DPs through emissions with the Procede by changing the o2 modifiers to 50% with the canclear disabled and drive it.

[HondaGoneRogue]

Correct. Procede can do that. Jb4 apparently needs the old dpfix setup. I ended up just putting my stocks back on.

[bruning6]

Originally Posted by HondaGoneRogue

Correct. Procede can do that. Jb4 apparently needs the old dpfix setup. I ended up just putting my stocks back on.

Ohhh nooooooooooo. How long did that take the second time?
Yea now I just need to figure out the whole lap top COM thing

[iloveboost86]

i ran the non-foulers on my evo's and my 03 corbra that had no cats and they worked great. im gonna do the same with my 135 when i go catless

[Kizzu]

sorry for bumping this old thread but would these non fouler plugs work on an n52? and which plug is compatible with the sensor hole?

[tmaroufi]

I'm running a defouler on my AR downpipe, and it doesn't keep the CEL off; however, it does help create about a 100 mile range where the sensor will not be triggered. I've been able to unflash and take my car in for service, with the downpipe installed.

[dcaron9999]

Originally Posted by tmaroufi

I'm running a defouler on my AR downpipe, and it doesn't keep the CEL off; however, it does help create about a 100 mile range where the sensor will not be triggered. I've been able to unflash and take my car in for service, with the downpipe installed.

So the Cobb AP will not clear the CEL automatically, and you need to do this manually with the "clear all DTC's" function?

[ParkNuts]

Originally Posted by tmaroufi

I'm running a defouler on my AR downpipe, and it doesn't keep the CEL off; however, it does help create about a 100 mile range where the sensor will not be triggered. I've been able to unflash and take my car in for service, with the downpipe installed.

Do you know if you've achieved O2 sensor readiness in that time frame? I need to get my car inspected and if I can get my car into readiness mode that would be perfect. As far as I know, that happens around 40 or so miles, but my car lights up a day or two after unplugging my can tool.

[A_Squared]

I'm running 42draft design o2 spacers with catless downpipes and a dinan tune. Never had a CEL and passed smog no problem. My readiness was always set, never had issues.

[PeteA]

Originally Posted by A_Squared

I'm running 42draft design o2 spacers with catless downpipes and a dinan tune. Never had a CEL and passed smog no problem. My readiness was always set, never had issues.

I've checked these out before. Which specific one are you using?

[A_Squared]

Originally Posted by PeteA

I've checked these out before. Which specific one are you using?

I got these ones in the link below. Leo at Eurotek did the install for me. These ones with the angle are what you need to give enough clearance down there to fit the O2 sensor in. Working like a charm for me.

http://www.etektuning.com/42-draft-o2-sensor-spacer/

[PeteA]

Sweet I might give one a go (not that I get a CEL on my 200 cell catted downpipe). I wonder what the other N55 guys are going outside of supressing the CEL via a tune.

[Kkuba]

Originally Posted by HondaGoneRogue

Just wondering if anyone is running plug defoulers on their catless DP's and if anyone thinks it would be prudent.

For those that don't know, they are made for spark plugs to sit the plug out of the cylinder a bit which helps them not foul in a richly running motor.


It's basically a spacer. I would hate to be damaging my O2 sensors since there are no cats there. Better explanation (grammar excluded) here:

Thoughts?

Can some one clarify, as I might be missing something here.

What i get form this is we have:
- a spark plug spacer, lifts the spark plug out of the cylinder slightly to reduce fouling in a rich environment?

How does this affect the 02 sensor?

Or do you lift the O2 sensor?

How does this prevent fouling of the spark plug, if you are getting incorrect readings from the O2 anyway as a result of this?

[MDRex]

You use it to lift the O2 sensor out of the exhaust path in the downpipe. This is done to change the reading of the sensor and prevent the car from throwing a cat inefficiency CEL.

They are originally meant to be used to prevent fouling of the spark plug, but it has nothing to do with the spark plugs in this usage. Hope this helps.

[dcaron9999]

Originally Posted by MDRex

You use it to lift the O2 sensor out of the exhaust path in the downpipe. This is done to change the reading of the sensor and prevent the car from throwing a cat inefficiency CEL.

They are originally meant to be used to prevent fouling of the spark plug, but it has nothing to do with the spark plugs in this usage. Hope this helps.

Is this approach 100% effective? Would O2 sensor alerts be prevented, even without the Cobb AP or BMS JB4 tune, when visiting a dealership for example, with tune removed?

[MDRex]

Originally Posted by tmaroufi

I'm running a defouler on my AR downpipe, and it doesn't keep the CEL off; however, it does help create about a 100 mile range where the sensor will not be triggered. I've been able to unflash and take my car in for service, with the downpipe installed.

Originally Posted by dcaron9999

Is this approach 100% effective? Would O2 sensor alerts be prevented, even without the Cobb AP or BMS JB4 tune, when visiting a dealership for example, with tune removed?

According to the quote at least one person still had a CEL, but unless they state which code caused their CEL we don't know if it was the cats or something else. It looks like a number of others did not have any codes or CEL when using the antifoulers. They are pretty cheap on ebay, worth trying for the $10-30 (depending on if you need angled ones).

[Freon]

They seem to work ok for secondary (narrowband) post-catalytic convertor sensors on some cars. It's worth a shot.

A better solution is a simulator. I used the narrowband simulator output on my Innovate LM-1 on my last car straight into the rear O2 signal pin on my ECU. There are other third part simulators for some cars, like ours. Or you can use a reflash (if available) and it will either disable the popping of the CEL, or change the thresholds for popping the CEL so it never turns on. Cobb flash will do this for the catless maps, but I think it won't help with readiness for emissions (it's probably just short circuiting a piece of code that pops the CEL but partly still thinks the signal is wrong), while simulators could.

I think the signal the ECU wants is pretty specific signal in relation to what it is doing with fuel injection and whatnot. Ultimately on cruise/idle it's looking for a simple oscillation from lean to rich and back (like what Dr. Euro posted), and that won't change by removing your cats. I think it's really looking for signs of proper warm up and temperature as that has effects on how quickly the oscillation occurs when the car goes into closed loop fueling, the pulse width bias in either direction for lean/rich, or how fast it goes lean once injectors turn off for decel, etc. It seems sometimes you get lucky and the defoulers alter the signal in the right way. It seems newer cars are less likely to be fooled.

[NORAGRETS]

Originally Posted by Das Ein

I have them on my AR catted DP's...fit just fine.

what kind of spacers and brand did you get?