How TO: CEL/MIL Eliminator!

Spooled said:
No, my setup tells the ECU that the second O2 is there and working fine. ...... Plus it's not in the exhaust flow, so there is less restriction.
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Thats just it. If I'm not mistaken, you're running without the rear O2 installed and the ECU is thinking its there and is OK. I'm runnin it for emissions and economy purposes. The nonfouler route still utilizes the rear O2 to help keep emissions under control, without fudging the voltage sent to the ECU. If I ran the MIL eleiminator, I wouldn't have known what was going on. My O2 took a s*** and the ECU caught the problem...thus the CEL coming on. If you're rear O2 ever took a s*** on you, you would never know because of the setup that your running (but I could be wrong)....but since it's not even installed, it doesn't matter!
 
P5 Rally said:
Thats just it. If I'm not mistaken, you're running without the rear O2 installed and the ECU is thinking its there and is OK. I'm runnin it for emissions and economy purposes. The nonfouler route still utilizes the rear O2 to help keep emissions under control, without fudging the voltage sent to the ECU. If I ran the MIL eleiminator, I wouldn't have known what was going on. My O2 took a s*** and the ECU caught the problem...thus the CEL coming on. If you're rear O2 ever took a s*** on you, you would never know because of the setup that your running (but I could be wrong)....but since it's not even installed, it doesn't matter!
Click to expand...

But you ARE "fudging" the signal to the ECU. The non-fouler reads less of the exhaust than it normally would, therefore telling the ECU that the exhaust content is something other than what it really is. The second O2 doesn't control exhaust emissions, it just checks to make sure that the catalytic converter is doing what it should be (accelerating the conversion of CO into CO2, etc.).

I don't even have a second O2, so the chances of it going bad are, well, 0%. I don't have a cat, so there is no need for me to run a second O2. If you are running exhaust that causes your second O2 to foul out or give bad readings, then there is no need for you to run a second O2. You just need to tell the ECU that everything is fine back there. Having that second O2 intact and sending a signal does NOT alter your emmisions as long as the ECU thinks everything is fine.

Again, the second O2 is a failure check to see if your cat is doing its job. That's all. If you second O2 is tripping a code and you have stock exhaust, then you have other issues. The non-fouler won't help you there.
 
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is there anyway to find which black wire is which, without having to use a power source finder? Just tryn to save time since i don't want to run a second O2
 
so once i install my ractive headers, cna i do this and leave the o2 sensor out or do i have to have it screwed into a bung? because i dont have the money to have a second bung put it at the moment.
 
02PROTEGE2.0 said:
so once i install my ractive headers, cna i do this and leave the o2 sensor out or do i have to have it screwed into a bung? because i dont have the money to have a second bung put it at the moment.
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I say just leave the 2nd sensor out and deal with the CEL until you have the money. Some people report lower gas mileage or something but myself and other haven't so who knows. I ran with the CEL for ~10,000 miles with no problem. I ended up just getting the MAM catted midpipe instead of getting a bung welded.
 
would it be unwise to get the catless MAM midpipe? its cheaper... and has he bung... and im poor. word.
 
From an environmental standpoint it would be extremely unwise. :)

Whenever I'm stuck behind someone running catless I want to die.
 
02PROTEGE2.0 said:
would it be unwise to get the catless MAM midpipe? its cheaper... and has he bung... and im poor. word.
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That would be a GREAT idea, If you dont care about riding cat-less, (Im not sure they have a Cat-less one, but they could, If so you would need to do the non-fouler trick to 2 of your 02 sensors (2 & 3) because there would be no cat at all) ME Im getting the MAM Mid pipe with a high flow Cat. Im getting it in a month or 2.
 
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the 2nd bung should be no more than $30 to be installed. Go to a LOCAL shop, not Midas. BTW, Where did you find a Ractive header?
 
RaiderMP5 said:
the 2nd bung should be no more than $30 to be installed. Go to a LOCAL shop, not Midas. BTW, Where did you find a Ractive header?
Click to expand...

I think he got it off ebay.

Yeah it would be arround 30$ to get the bung installed but 99$ for a MAM mid pipe and he will get better gains from the header + Mid pipe.
 
wow i forgot that i posted in this... haha
yea they have a catless one from mam... its 99 as opposed to 199...

i dont think i wanna go completely catless... that stuff is crazy loud.

30 bucks eh? i'll ahve to look into that!
 
wow i forgot that i posted in this... haha
yea they have a catless one from mam... its 99 as opposed to 199...

i dont think i wanna go completely catless... that stuff is crazy loud.

30 bucks eh? i'll ahve to look into that!
 
btw... yea i got that ractive header off ebay... and i got it for 60 shipped! i got it thru a 99 cent no reserve store on ebay... the bid ended at like 10 30 on a tuesday... middle of the day... so no one else bid on it... so i got that thing dirt cheap... well worth the money for that price!
 
don't bother with catless. There's seriously like 0 performance gain and who the hell cares.. why bother ******* the environment, even if it is just a little bit.
 
well im catless right now only cuz my corksport exhaust elminates the cat under the car, and i put just the header on which elminates the pre cat, so for now im catless until next week when i put the high flow cat in.
 
the CEL on my 00 Protege is on, car seems to be getting less mileage now with it onf...when I ran the code i got p0421...

will this eliminate that code and make the car run better?

thanks...
another newb...
 
Gordinho80 said:
the CEL on my 00 Protege is on, car seems to be getting less mileage now with it onf...when I ran the code i got p0421...

will this eliminate that code and make the car run better?

thanks...
another newb...
Click to expand...

welcome newbe...have you removed your cat?...this cel/mil eliminator is for those who have removed their frist cat...(installed a header or turbo/downpipe)....the po421 code is:P0401 Exhaust Gas Recirculation Flow Insufficient Detected
 
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