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DoogiesDak
Dodge Dakota
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4/07/2008
11:55:17

Subject: CatConv.vs.Test Pipe
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I have a 2000 5.9 4X4 with a cat converter rattle. Just wondering if anyone here has removed cat and placed a "test pipe" in its place with good results. I know there's an O2 sensor before and after the cat. With a straight thru pipe, will it give a check engine code? Thanks in advance.



Lee
Dodge Dakota
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4/07/2008
14:55:19

RE: CatConv.vs.Test Pipe
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"With a straight thru pipe, will it give a check engine code?"

It will if everything's working the way it's supposed to. The post cat O2 sensor is supposed to detect when the cat isn't working properly, so if there's no difference in the readings between the pre-cat sensor and the post-cat sensor (which is the case when using a test pipe or if the cat isn't working anymore), the Check Engine light should illuminate.



jason c
Dodge Dakota
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4/09/2008
10:47:09

RE: CatConv.vs.Test Pipe
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my 99 5.2 dosent have a cat. I have a set of gibson headers going into a 3" single pipe into a single in, duel out 40 series flowmaster.
Its loud. kinda raspy.i want to get a magnaflow.
go to thefastman.com he has O2 simmulators. It will fool your computer into thinking there is a working cat in place.I works.I have one,and my check engine light hasnt ever come on.there like 70 bucks



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