Nitto Mid-Pipe Check Engine Light fix

[Smokey159]

I wonder what the soldering of wires does to the fuel mappping, if anything.

[03Z33]

Originally Posted by Smokey159

I wonder what the soldering of wires does to the fuel mappping, if anything.

As stated above, the second O2 sensor does not affect fuel mapping in any way, it is only in place to confirm to the ECU that the catalytic convertor is in place and functioning properly. Even with this sensor completely removed your performance and fuel mileage will not change.

[largeorangefont]

Originally Posted by ROCKLAND TOYOTA

besides that i do believe EVERYONE experiences a CEL with the defouler eventually.on the other hand the soldering of the wires looked to be a good deal though........

No they don't. If you don't get a CEL in the first littel bit, you will probably never get one. I have been installing mechanical CEL fixes on my customer's cars for years. Some cars need 2, or the 90 degree bung method works as well.

I like the anti foulers better than the soldering method. The mechanical method can never fail.

[ROCKLAND TOYOTA]

Originally Posted by largeorangefont

No they don't. If you don't get a CEL in the first littel bit, you will probably never get one. I have been installing mechanical CEL fixes on my customer's cars for years. Some cars need 2, or the 90 degree bung method works as well.

I like the anti foulers better than the soldering method. The mechanical method can never fail.

REALLY, please elighten us as to who accomplished this.

[ROCKLAND TOYOTA]

Originally Posted by kurokoma-kun

yay! 100 miles with both antifoulers and no cel... in your opinion, is this a permanent fix? any idea what i can expect at next year's emissions test?

if you have no problems GREAT but ive seen some on here who drove for 2 weeks with nothing and then BLAM...........

[ROCKLAND TOYOTA]

Originally Posted by kurokoma-kun

for me its an experiment, if this thing doesn't fix it then it will be time for plan B

however, i am wondering what you mean by BLAM something other than the cel go wrong?

NO it just happens all of a sudden......

[cali yaris]

I love innuendo... I know it's important to get tested regularly, but...

Kuro, We don't have to smog this car here in CA for five years (then it's every other year). Do you have different rules there?

[at3GG]

I didnt mean "issue" like that castrex, i meant having the CEL come on and bug us as we drive. I know its just the ECU doing its job. If i do keep the cat like you suggest, will larger diameter piping after it do that much? Isn't the cat what is most restrictive on our cars? Or is it the small diameter piping?

[CASTREX]

I have seen the cats on the inside and they look good. Not very restrictive. Very similar to other expensive high flow cats I've seen.

On my car I did removed the secondary cat and leave the OE primary cat on as I saw no need to remove it.

To me the most restrictive part of the exhaust is the pipe between the resonator and the axle. It's all crushed.

If you are interested on making the most out of your exhaust go for some smooth mandrel bent pipe on 2". If you can't get a mandrel bent pipe go 2.25" pipe.

Removing the cats will net you maybe a couple hp at the top end of the power curve. If you are hardcore and want to go all out then go for it.
But for normal every day driving you won't feel a difference.

In my opinion unless you are planning on doing serious motorsports with your car it doesn't really worth it.

Eventually when you have to take your car to an inspection you will have to instal a cat again. If that is not a problem then do it.

[largeorangefont]

Originally Posted by kurokoma-kun

oh! innuendo, eh... what i meant to say was, i've enjoyed wrapping both hands around the shaft of a tool and getting myself a nice long, fat, steely, sizzlin hot piece of PIPE!




yay! 100 miles with both antifoulers and no cel... in your opinion, is this a permanent fix? any idea what i can expect at next year's emissions test?

You probably wont get a CEL , but if your state has a sniffer test, it will not pass without cats.

[largeorangefont]

Originally Posted by ROCKLAND TOYOTA

REALLY, please elighten us as to who accomplished this.

How hard is it to understand.. 1 or 2 antifoulers move the o2 sensor far enough out of the exhaust stream to not throw a Cat Inefficiency CEL when you are running catless.

I've used this method on hundreds of cars.. Subarus, Evos, Toyotas, Mustangs etc.

I did this on my WRX about 6 years ago. I didnt know about antifoulers then, but this was cleaner.

[at3GG]

Thanks castrex...I'll be leaving it right where it is.

[ROCKLAND TOYOTA]

Originally Posted by largeorangefont

How hard is it to understand.. 1 or 2 antifoulers move the o2 sensor far enough out of the exhaust stream to not throw a Cat Inefficiency CEL when you are running catless.

I've used this method on hundreds of cars.. Subarus, Evos, Toyotas, Mustangs etc.

I did this on my WRX about 6 years ago. I didnt know about antifoulers then, but this was cleaner.

YEAH, thats cool and all but what you fail to realize is the LEARNING ecu that will eventually catch on and prove my point......

[largeorangefont]

Originally Posted by ROCKLAND TOYOTA

YEAH, thats cool and all but what you fail to realize is the LEARNING ecu that will eventually catch on and prove my point......

Rockland,

Your ECU is not scouring the internet looking for proof that you have screwed with it.. and throwing CELs when you wake up in the morning.

What you fail to realize is how an ECU works. ECUs operate on voltage signals from sensors. When voltage is out of an acceptable range on a given sensor for a certain amount of time, an CEL is given (or worse, it depends on the sensor).

By wiring in a resistor to give the ECU a different voltage reading, or by mounting the o2 sensor out of the stream of exhaust you change the voltage sent to the ECU. If the "new" signal is within accepted limits, a CEL is never thrown. These limits don't change, and the ECU does no "learning" for the rear o2 sensor.

If you don't throw a CEL in the first couple days, or couple hundred miles, you will probably never see one for cat ineffiecicy. These types of CELS are not thrown right away because cats are less effective when cold, and the ECU is programmed to account for that. Again, no "learning" involved.

[whooppee777]

Originally Posted by largeorangefont

How hard is it to understand.. 1 or 2 antifoulers move the o2 sensor far enough out of the exhaust stream to not throw a Cat Inefficiency CEL when you are running catless.

I've used this method on hundreds of cars.. Subarus, Evos, Toyotas, Mustangs etc.

I did this on my WRX about 6 years ago. I didnt know about antifoulers then, but this was cleaner.

if im not mistaken this is almost exactly like the piece that the wayne guy makes, the guy whose email i listed earlier

[ROCKLAND TOYOTA]

Originally Posted by largeorangefont

Rockland,

Your ECU is not scouring the internet looking for proof that you have screwed with it.. and throwing CELs when you wake up in the morning.

What you fail to realize is how an ECU works. ECUs operate on voltage signals from sensors. When voltage is out of an acceptable range on a given sensor for a certain amount of time, an CEL is given (or worse, it depends on the sensor).

By wiring in a resistor to give the ECU a different voltage reading, or by mounting the o2 sensor out of the stream of exhaust you change the voltage sent to the ECU. If the "new" signal is within accepted limits, a CEL is never thrown. These limits don't change, and the ECU does no "learning" for the rear o2 sensor.

If you don't throw a CEL in the first couple days, or couple hundred miles, you will probably never see one for cat ineffiecicy. These types of CELS are not thrown right away because cats are less effective when cold, and the ECU is programmed to account for that. Again, no "learning" involved.

good explanation but i never said the wiring method was bad. just the fouler

[at3GG]

How much should a custom cat to axle exhaust run from a decent shop anyway?

[largeorangefont]

Originally Posted by ROCKLAND TOYOTA

good explanation but i never said the wiring method was bad. just the fouler

The foulers do the same thing but mechanically. You are reducing the amount of exhaust gasses the sensor is exposed to, and skewing the reading. Some cars need 2 of them to keep from throwing CELs, one drilled for the sensor, and one undrilled.