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BENVAAGE
Dodge Dakota
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10/28/2010
13:39:34
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 Subject: o2 sensor
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what is the resistance of the O2 sensor after the cat when everythings in working order? Im gutting my cat so ill be replacing the o2 sensor with a resistor. i have a dodge dakota 2000 4.7 liter
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BENVAAGE
Dodge Dakota
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10/28/2010
20:56:02
| RE: o2 sensor
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Message:
?????????
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?
Dodge Dakota
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10/29/2010
12:53:43
| RE: o2 sensor
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I don't believe that a 'regular' resistor will work for this .
There are 'sim' devices to use however .
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BENVAAGE
Dodge Dakota
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10/29/2010
13:00:06
| RE: o2 sensor
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when the engine is running the o2 sensor sends certain amount of volts to the computer telling it how much o2 is in the exauhst. if it is too much or too little, the engine light goes on. A resistor would work if you got the right amount of ohms to send the right amount of volts to the computer.
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daddio
Dodge Dakota
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10/29/2010
13:59:07
| RE: o2 sensor
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"if you got the right amount of ohms to send the right amount of volts to the computer."
Yes but, I believe that voltage is supposed to vary somewhat. If it does not it will probably trip the CEL.
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BENVAAGE
Dodge Dakota
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10/30/2010
11:06:47
| RE: o2 sensor
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Hmmmmm alright, well ive been wrong before. how much would a simulator cost?
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BENVAAGE
Dodge Dakota
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10/31/2010
11:13:13
| RE: o2 sensor
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someone just told me that you can siply ziptie the sensor to the frame! the computer would still sense that the cat is doing its job right?
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daddio
Dodge Dakota
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10/31/2010
11:59:10
| RE: o2 sensor
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I have read that some have done that before. Why are you gutting the cat in first place?
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BENVAAGE
Dodge Dakota
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10/31/2010
19:10:23
| RE: o2 sensor
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my friend claimed to have gained 5mpg. and the cat has alot of miles on it anyways.
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daddio
Dodge Dakota
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11/01/2010
07:22:32
| RE: o2 sensor
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"my friend claimed to have gained 5mpg"
On a Dakota or any other vehicle, highly doubtful, unless it was plugged completely. And I hope you don't have any emissions testing where you live.
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BENVAAGE
Dodge Dakota
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11/01/2010
11:54:38
| RE: o2 sensor
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ya i was also doubtful of that. he had a 99 cherokee with a 5.2 in it. but ill take any performance, and mpg gains i can get. i dont have emissions testing.
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daddio
Dodge Dakota
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11/01/2010
13:47:22
| RE: o2 sensor
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Message:
Don't expect much if any gains.
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Forged
Dodge Dakota
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11/21/2010
13:37:30
| RE: o2 sensor
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I felt I had to chime in here. Do not waste your money on those stupid electronic o2 sims and whatnot that may or may not even work. Don't even need a resistor. Don't worry about all that crap.
All you need is a pair of spark plug defoulers.
I have a 98 Dakota Sport 5.2 5spd. I recently put in a full 3" exhaust (all the way from front to back (collector included)) with a magnaflow muffler and high-flow cat (model 14109), which is basically straight pipe. I can't find pics of it, but basically, you can look through it and it's just a big 3" hole all the way through with the catalytic material around the outside. I got it from Performance Peddler. (http://www (dot) performancepeddler (dot) com/detail.asp?PRODUCT_ID=MAG14109)
Anyway, I don't want to link to another forum, but if you google "do it yourself o2 simulator," it should come up. There's a dude on there who did this, and provided lots of great photos. So I gave it a shot, and it works AWESOMELY. For a fraction of the cost of any of these other ridiculous solutions. No check engine light; no "limp mode;" no problem!
Basically you buy the defoulers which come in a pack of two for like a couple bucks. Drill one of them out with a half inch drill bit. Easiest way is with a drill press. I didn't drill mine all the way through. Just far enough that the sensor can fit in snugly without pressing up against the bottom of the defouler. Screw the two defoulers into each other, and plug the sensor into that, then screw that whole assembly into your o2 bung. No more check engine light. :)
I did this a while ago and no light yet. I can get on it, and my exhaust sounds so lovely, and the sensor doesn't complain, because it feels the heat, and senses clean air. :) (And DAMN is my exhaust loud and impressive on the freeway, or even just around town!)
** Disclaimer: Off-road use only. Not responsible for your tickets. :D **
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dak99-bust
Dodge Dakota
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11/22/2010
12:01:29
|  RE: o2 sensor
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What do you guys think of these two options?
A mini cat right infront of your O2 sensor
http://www.bigdaddiesgarage.com/mini-cat-cel-fix.html
A module that sends the correct signals back
http://www.thefastman.com/02Simms.asp
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Forged
Dodge Dakota
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11/23/2010
21:10:01
| RE: o2 sensor
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Message:
The first one is effing scam gimmick bullcrap. The second one probably is too.
Seriously, just buy the $2.00 spark plug defoulers and make your own in 10 minutes. It works perfectly. That's essentially what that first option is, only he's trying to rip people off by saying he somehow managed to find precious metal honeycombs and is putting them inside. BULLS**T. It's that grout netting stuff or whatever.
Basically, how this trick works is it takes the sensor out of the airflow, so that it detects the heat from the exhaust, but tells the computer the air coming out is clean. Trust me. Don't waste your money on those stupid unnecessary gimmicks.
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Forged
Dodge Dakota
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11/23/2010
21:16:23
| RE: o2 sensor
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Message:
http://img.photobucket.com/albums/v91/stillwill/CEL%20fix/Help003b.jpg
Buy those.
Drill one out with a half inch drill bit to look like this:
http://i250.photobucket.com/albums/gg268/12sws27/how%20to%20pics/newproject98Jimmy310.jpg
Then screw the sensor into the one you drilled out, and put the other one on the end of that so it looks like this:
http://i250.photobucket.com/albums/gg268/12sws27/how%20to%20pics/newproject98Jimmy315.jpg
Then plug it all back into your exhaust. No more light. If the light stays on after driving it for a while, that means there is another problem elsewhere; possibly clogged plugs.
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dak99-bust
Dodge Dakota
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11/26/2010
11:54:19
| RE: o2 sensor
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Message:
Thanks Forged I will give it a try, I assume the spark plug defoulers only come in one thread pattern and it matches the O2 sensor?
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Forged
Dodge Dakota
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11/27/2010
00:07:30
| RE: o2 sensor
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Message:
Yep. I had no problems with my setup. :) The defoulers have the same size head on them as the stock sensor too, so you only need one wrench. Guess the threading is a standard size, and it happens to be the same for your spark plugs. :P
But yeah, $2.50, and no CEL.
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