Emissions test question - Ford Powerstroke Diesel Forum
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post #1 of 5 Old 07-06-2010, 04:13 PM Thread Starter
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Emissions test question

I have a few questions for you guys in Utah. I live in Riverton and just bought my first PSD. Its a 97 f-250 completely stock. I want to remove the cat and muffler, but was wondering if it is legal to do so. If it is ok to remove them will i be able to notice a difference in performance? Will it be a lot louder? Thank you for any help you can give me. Sad thing is I feel like a complete D.A. when it comes to Diesels. I have a lot of years of experience with gas motors. I have always wanted a Diesel so now i have one without the approval of the misses. She wanted a newer one, but I'm to much in love with the 93-97 body styles. Sorry to ramble. So any input would be great.
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post #2 of 5 Old 07-06-2010, 04:34 PM
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1st yes its illegal, but I'd only worry if your in a state thats requires testing,
2nd you well notice a diffrence in both performance and mpg
3rd yes it will be louder

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post #3 of 5 Old 07-07-2010, 05:26 PM
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Yeah, its illegal. People do it anyways. Just when it comes time for inspection put the cat and muffler back on or it will not pass. I tried to get through with just a cat delete and needless to say I didn't pass. It will be a lot louder with the deletes.

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post #4 of 5 Old 07-07-2010, 06:47 PM
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What ever you do with the exhaust, KEEP the cat. if you go in and fail a test without it you will need to buy a new one and provide proof of purchase to pass. I called ahead and asked if my truck needed it to pass. which it did so I just put it back on for the test. btw it will be coming off again as soon as I get around to it.

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post #5 of 5 Old 01-05-2011, 09:16 AM
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This is an old thread, but I'll respond anyway. Of course it's illegal but depending on what county you live in you may or may not need an emissions test. I live in Utah county and have no emissions testing. I believe Salt Lake County does. Seems like the tooele valley doesn't, etc..

I got this from the Utah DMV site.

Diesel-Powered Vehicle Testing Requirements
For information about emissions test requirements contact the appropriate County Health Department below:

Davis County 801-546-8860
Salt Lake County 801-313-6720
Utah County 801-851-7600
Weber County 801-399-7140

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