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Diesels and Smog Testing

763 Views 48 Replies 17 Participants Last post by  Cooter
A friend has a 1995 F-350 with the 7.3 powerstroke. Lately he has been getting really bad mileage and I suggested taking the cat off.

Since it is diesel, I was surprised there was even one on there to begin with. Are they required on a 1995 truck?

If he cuts it off, will he get any grief come inspection time?
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A friend has a 1995 F-350 with the 7.3 powerstroke. Lately he has been getting really bad mileage and I suggested taking the cat off.

Since it is diesel, I was surprised there was even one on there to begin with. Are they required on a 1995 truck?

If he cuts it off, will he get any grief come inspection time?


The better solution would be to take it off, gut it out, and weld it back in. I know on gas cars, even when emissions aren't tested, if it came stock with a cat, the cat has to be in place or it will fail 'visual' inspection.
I took mine off of my 2007 2500hd and had it inspected last week. They did not even open the hood basically did a safety and charged me 16.50. I do know that in 2010 there "might" be some new reg. for diesels.
I had a straight pipe on my old cummins and never had a problem getting it inspected.
I know on gas cars, even when emissions aren't tested, if it came stock with a cat, the cat has to be in place or it will fail 'visual' inspection.
I'm sure that's probably the case, but I don't think cats were widely used on diesels in 95??

It looks like the old pellet style cat too, not a newer honeycomb type.
Eh, hack it off.

I have yet to see someone at an inspection place look under a diesel to see whats there. Its safety only, and thats all they check.

Now if you go up to the eastern commie states or commiefornia, then youd have a problem, but not here in the great state of Texas!:usa2:
I've tried a couple places and no one will cut this damn thing off. I would do it myself if I had a welder.

I even tried pulling it off to gut it, but the thing isn't coming off without a torch and being welded back on.

Any diesel friendly places in the area that will cut one off? If so, please send me a PM
LOL the guy that does my state inspections couldn't even tell you what color my cars are. Slap the sticker on and go.
LOL the guy that does my state inspections couldn't even tell you what color my cars are. Slap the sticker on and go.
I'm not worried about inspection... that's not an issue. It's finding someone that will cut this POS useless converter off! :mad:
Doesn't have to have resonator or cat to pass inspection, diesel's are a safety only inspection
Doesn't have to have resonator or cat to pass inspection, diesel's are a safety only inspection
I know this... and I've told that to a couple different muffler shops. But everyone refuses to remove the cat off this 1995 F-350 diesel dually.
I'm not worried about inspection... that's not an issue. It's finding someone that will cut this POS useless converter off! :mad:
Any muffler shop will do it, its not illegal.
Any muffler shop will do it, its not illegal.
Really? I tried three this weekend and they all said the same thing. Maybe you wanna go with me? LOL
Come to grand prairie to j's alignment and muffler, those muffler shops you are going to are just idiots. Hell you can take it out and take a piece of rebar and jab it out and then put it back on if you want. I have an 06 dually with a straight exhaust and i get it inspected every year with no problem.
Doesn't have to have resonator or cat to pass inspection, diesel's are a safety only inspection
Not true. State law says if it came with a piece of emissions equipment (cat, EGR, PCV, etc), it has to be in place and functioning, whether it gets tested or not.
Not true. State law says if it came with a piece of emissions equipment (cat, EGR, PCV, etc), it has to be in place and functioning, whether it gets tested or not.
I don't think it matters on a diesel.
should be a visual on the inspection only for a diesel and i dont think ive ever got an inspection where somebody actually looked the vehicle over.
Jesus. Do some of you people even fucking read?



Passing inspection isn't the problem. If a car comes with factory installed emissions equipment, it is ILLEGAL to remove it. Hence why he can't find a muffler shop to remove it. TXDOT nails people with fines for this very thing. They have u/c officers, if that's what you want to call them, and their sole job is to find muffler shops to do this very thing so they can fine them at $5000 a pop or something like that. God damn. READ you fucking idiots, READ!



I'd help you out, but I don't have a welder.
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