One of my friends does not have a cat on his 04, and is wondering about emmisions tests... Will it still pass? Not the fact that the 04 did not come with the a cat, but if he actually ran a test on in.

 

I may be wrong- but I believe 04's did not come with a cat and 04.5's did. My buddy has an 04.5 and he has that dreaded piece of metal under his truck.

 

https://www.dieseltruckresource.com/...d.php?t=173873

 

Removing the CAT is a big fine in the US if you get caught.

 

I have often wondered the same thing... If there is no can on there to begin with, how does it pass an emmisions test?

 

This thread is not asking about removing the cat! What he is asking is how can trucks prior to 2004.5 with no cat from the factory pass emissions?

 

they may have to now but, diesels don't have to go through emissions. The three states I've lived in anyway don't require it.

 

yes it will pass emmisions because it will be grandfathered into the rules. if the factory didnt require it to have a cat, then the state cannot make you get one.

On a side note, i heard that california is looking into paying for emmision repairs on vehicles that this pretains to. if you vehicle didnt have a cat then the state will pay to have one installed.

 

i thought the test for diesels was opacity...

brett

 

Smarty SW 0.

 

Let's be clear..............I am not recommending that anyone remove the catalytic converter from any vehicle.

Here are some hard facts:

I attended a recent "dyno day" here locally and witnessed the "pull" of an '07 CTD, bone stock, at 269.3/511.5. Then an '06 CTD, with a 5" turbo-back straight through exhaust system (no cat/con or muffler) at 276.9/534.7. The only difference between these two trucks was that huge 5" exhaust sysytem. Also noteworthy was that fact that the EGTs on the truck with the straight-pipe were much lower.

Why is it that turbo-back exhaust systems (for '04.5 and newer trucks) that have no provision for a catalytic converter are marketed and sold a regions that are emission controlled? Why is it that catalytic converter "test pipes" are marketed and sold in emission controlled areas?

Why is an '04 CTD not required to have a cat/con, but an '04.5 and newer required to have one? It seems to me that it's the same motor.

Just another case of the Feds getting "in-your-face" as far as I can see. Kind of like the seatbelt issue, but that's discussion for another thread.

 

Diesels have to go in for emissions every other year for trucks older than 6 years. All you do is rev the engine and they look for smoke. SW-0 no problems hehehe

 

Good to know.

Everybody needs to follow their own conscience when it comes to pollution. Seems like some people like to look down their noses at the people that like the smoke. But not everybody that blows a little smoke now and then is a serial polluter. I like a little smoke once in a while. But I live close to work, carpool in an 86 Camry to work, vacation very infrequently by plane, live in a temperate climate, mow a small portion of my property and let the rest be wild habitat, and way too much stuff to list. But I like to smoke once in a while and don't think I'm going to stop.

 

"But I like to smoke once in a while and don't think I'm going to stop."


Tsk,tsk,tsk!! (Hopefully it's organic!)

 

While ya'll are talking about catalitic converters - has anybody had one to clog up and have to be replaced and what is the reasonable life of diesel converter?
Yes, mine is still on my truck - and I wonder how much stuff can it hold.