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Exhaust 5.7 HEMI Exhaust Discussion


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  #1  
Old 11-21-2013, 12:54 PM
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Vinnie the Wrench Vinnie the Wrench is offline
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Default O2 cel

Hey guys,

I have a 2012 Ram and have been having the CEL come on recently for the O2 sensors.

As far as my exhaust, I have had BBK shorty headers and a Cherry Bomb Vortex on for the last few months with no issues. But recently I had a set of Magnaflow High Flow Cats installed as well as resonators deleted and the CEL lit up on my way home.

They had put the spacers on for the sensors at the muffler shop which would be the same as throwing non-foulers on there to move the sensors out of the stream. I also tried ordering "mini cats" from bigdaddiesgarage.com but after a day the light came back on.

I saw there used to be simulators for sale but due to EPA regs they are hard to come by these days.

I know I cant be the only one with this issue and was hoping someone out there has some input for me so I can turn that damn light off.

Thanks,
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Old 11-22-2013, 12:28 PM
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Anybody??? lol...
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Old 11-22-2013, 01:10 PM
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Do you have pics of the spacers they used? Might be different than the non fouler trick. not only do the non foulers space the O2's out of the stream, they have a small diameter.
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Old 11-22-2013, 09:51 PM
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I took the spacers off and compared them for the same thing you just said. They are basically identical. I took them off and tried the ones I received from bigdaddiesgarage.com also, which have small filters in them. It seems they keep the light off longer but after a day or so it still triggers the CEL.

Nice quote by the way Sean...lmao
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Old 11-23-2013, 11:37 AM
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Thx

My next suggestion was going to be to pack steel wool into the non foulers or spacers or whatever you are using.

I'm not good with electronics but someone who is could talk you through making a "simulator". All you do I believe is use a resistor(s) to alter the voltage for the signal coming from the O2 sensor. Just about every sensor on the truck merely sends a certain voltage to the pcm and that corresponds to some reading, to which the pcm makes adjustments.
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Old 11-23-2013, 10:56 PM
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Quote:
Originally Posted by snrusnak View Post
Thx

My next suggestion was going to be to pack steel wool into the non foulers or spacers or whatever you are using.

I'm not good with electronics but someone who is could talk you through making a "simulator". All you do I believe is use a resistor(s) to alter the voltage for the signal coming from the O2 sensor. Just about every sensor on the truck merely sends a certain voltage to the pcm and that corresponds to some reading, to which the pcm makes adjustments.
That is correct to a point but the reason they dont make them very readily is because with advancement in computers they do not work the computer actually compares the reading from the back sensor against the front sensor with a certain amount of allowed error as the check for functionality but if the voltage stays constant to long it will also throw a code.... I would suggest the spacer packed with steel wool first and see of that fixes it
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Old 11-25-2013, 06:43 AM
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Thanks guys, Im going to grab some steel wool today. Hopefully it works otherwise it looks like I'm going to need to switch tuners to the diablo so I can kill the sensors. If it's not one thing it's another!!
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