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Custom Dodge Ram Performance Mods - Engine - 4.7 Liter V8 Discuss modifying your Dodge Ram with Performance Parts and Accessories!
Factory Spec: 4.7-liter V8 engine - 310 horsepower, 330 lb-ft of torque.


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  #11  
Old 09-23-2009, 12:59 AM
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If you have a hand held tuner like a superchip you can clear the code out that way as well, and the engine light will go off.
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Old 09-23-2009, 01:29 AM
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The code P0420 is your clue for cat failure meaning it isnt working or isnt there. My code comes on once every few months. I pull the battery for 10 minutes and reset the computer. Or pull the 02 out of the stream and that will clear it eventually.

The extensions work as well. They simply pull the sensor out of the main path of the exhaust. The foulers are the cheap and effective way to do so.
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Old 09-24-2009, 12:47 AM
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I think there might be two issues in play here. Do the tuner guys use a non fouler to keep the o2 from getting carboned up?

The under 8800 GVWR trucks...basically 1500's , have to meet the same standard as cars. The front o2 must switch 80% more than the rear or you get an Cat efficiency monitor code.

The technology assumes that if the cat lit off then there will be less oxygen switching activity after the cat than before.
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Old 09-24-2009, 01:46 AM
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The non-foulers are used to prevent the CEL from activating.

Leadfootluke said it well, the basic idea is to pull the sensor out of the direct path of the exhaust flow. The sensors aren't completely cut off from the exhaust flow, just slightly removed. The non-foulers have worked very well in many different types of applications. It's an option for people who want to remove the cat or gut out the cat.

You also have the option of using a tuner to clear the code as volcom suggested.
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Old 09-24-2009, 07:11 AM
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I don't know if they're made for our trucks, but a lot of performance companies make O2 sensors designed for non-cat applications in race cars or other high performance vehicles.
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Old 09-24-2009, 07:17 AM
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Quote:
Originally Posted by SilverFire View Post
I don't know if they're made for our trucks, but a lot of performance companies make O2 sensors designed for non-cat applications in race cars or other high performance vehicles.
Yeah, but no sense in buying a new sensor when you can get foulers for almost nothing. In the event of a fouler not working properly, you may simply pull the 02 sensor out of the exhaust altogether, and relocate it up against the frame and semi-isolate it from the elements (that may not be possible for some of you with wetter climates).
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Old 09-24-2009, 09:03 AM
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Quote:
Originally Posted by Leadfootluke View Post
Yeah, but no sense in buying a new sensor when you can get foulers for almost nothing. In the event of a fouler not working properly, you may simply pull the 02 sensor out of the exhaust altogether, and relocate it up against the frame and semi-isolate it from the elements (that may not be possible for some of you with wetter climates).
True enough...I'm just kinda weird, and I like to do things as close to right as possible on the first pass...not to mention I'm a tuner, so every little bit has to be perfect, or I toss it and try again.
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