Running without a cat converter
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Registered User
Joined: May 2009
Posts: 26
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From: Alabama
Running without a cat converter
I took out my converter and put true duals with flow 40 series....only 2 mufflers no converter...i was hopeing the o2 sensor wouldnt throw a code and about a week later it did....(code number po420 catalyst efficiency) and i was wonderin if anyone knew a way around this...i would really appreciate your imput...thankyou
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Joined: Jan 2008
Posts: 8,374
Likes: 28
From: Sioux Falls, SD
If he still makes them:
http://www.thefastman.com/02Simms.asp
Otherwise, some of the slightly older Rams you could weld a small extension onto the O2 sensor port, and screw the sensor into the extension. The extension would have the sensor be out of the exhaust stream. I don't see why that wouldn't work for our newer 2001s.
http://www.thefastman.com/02Simms.asp
Otherwise, some of the slightly older Rams you could weld a small extension onto the O2 sensor port, and screw the sensor into the extension. The extension would have the sensor be out of the exhaust stream. I don't see why that wouldn't work for our newer 2001s.
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Joined: Sep 2009
Posts: 77
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From: Middlebury, IN
I took my cat out and only pluged the front O2 sensor in on my truck and just took out the sencond completely out. It will run the truck off the second O2 sensor memory and just throw a volts to high or low code and still run the truck just fine. If you leave the second one in and it gets a bad reading then it will throw that code you have and make the truck run poor.
Site Moderator
Joined: Jan 2008
Posts: 8,374
Likes: 28
From: Sioux Falls, SD
sanford35 is correct. If the first, before the cat, O2 sensor is still plugged in, your truck will run fine.
The second O2 sensor, post-cat, has nothing to do with how the truck runs. All it does is tell the computer if the cat is working properly or not, and if it isn't pops a code saying it isn't. Personally, that yellow CEL on all the time would bug the crap out of me, but its up to you.
Not to mention you would have to check codes periodically, as you have the CEL on for that post-cat O2 sensor on all the time, you can't tell when another code pops up unless you scan it regularly.
The second O2 sensor, post-cat, has nothing to do with how the truck runs. All it does is tell the computer if the cat is working properly or not, and if it isn't pops a code saying it isn't. Personally, that yellow CEL on all the time would bug the crap out of me, but its up to you.
Not to mention you would have to check codes periodically, as you have the CEL on for that post-cat O2 sensor on all the time, you can't tell when another code pops up unless you scan it regularly.
