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42DD DP pipe...will it pass inspection without the cat?

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Old 10-10-2008, 12:30 PM
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Default 42DD DP pipe...will it pass inspection without the cat?
i have NJ vehicle inspection this month...i'm wondering if my car will pass inspection without removing the 'test' pipe.

i have the 42DD cat...if i need to put it in. wonder if anyone passed inspection without the cat.
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Old 10-10-2008, 01:06 PM
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Default im pretty sure, thats a big NO >
i live in PA and it wont... im sure thats the same most everywhere inside the USA
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Old 10-10-2008, 01:09 PM
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drive your gas tank down to very little then fill it with a few gal's of denatured alcohol
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Old 10-10-2008, 01:15 PM
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Default depends on how they test emissions, if they scan for codes
as long as you don't have a CEL and all of the readiness codes are set you're fine.
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Old 10-10-2008, 01:31 PM
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Default how much is a gallon of denatured alcohol? Have you actually tried this?
What pollutant are you trying to address with this method? What ratio of alcohol to gasoline do you need for the engine to even start up?
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Old 10-10-2008, 01:36 PM
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Might be better off giving some alcohol to the inspector. :-)
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Old 10-10-2008, 01:40 PM
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Default My car doesn't throw a CEL for the rear 02 sensor but it doesn't set readiness for it either
i'm thinking if I put on my angle block this would change, but i'm not sure.
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Old 10-10-2008, 02:19 PM
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Default i don't have any CELs for some time now...so i would be okay with the test pipe in?
or should i play it safe and pop the 42DD cat in?
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Old 10-10-2008, 02:20 PM
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this will be in NJ. not sure how they test emissions.
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Old 10-10-2008, 02:28 PM
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Default The cat will help the sniff test - but like John said - if you have codes....
or readiness isn't set - you'll fail the test - at least in most places. If you have codes - you need to clear them and then wait for readiness to set - which takes a bit of time - depending on your driving etc. Whatever you do - if you have codes don't clear them right before the test - you'll fail readiness.
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