Jim991

I wonder if they will pursue Cobb and other tuners next.

https://www.epa.gov/newsreleases/epa...defeat-devices

MDelaney

On one hand, I wonder if they are specifically targeting changes made to the emissions systems in the vehicles - but on the other, it seems like any performance change is going to have some impact on what comes out the back of the car.

I also am not familiar enough with exactly how tuners achieve the performance gains (adjusting turbo pressure, shift points, etc) to know how integral the emissions systems are.. I remember growing up in the 70's/80's when it was a no-no to remove your catalytic converter from your exhaust - seems like this is the the digital age equivalent..

SoCal C2S

OliverK68

Derive sounds more brazen than the tuners commonly mentioned here.

https://www.google.ca/amp/s/jalopnik...1829348318/amp

skiahh

Crap. Maybe I need to get one for my 2003 Ram before they all disappear!

Wonder if they'll specifically target the tunes coming out to help unmake the CD fix?

What a crock! This shows how utterly out of touch these people in the EPA are with reality. Pretty much everyone who buys these tuners knows how their vehicle functions, how the emission controls work and don't give a rat's *** about what the Clean Air Act entails. So the company is going to have to, quite literally, throw money away creating an education program absolutely NONE of their customers will watch, read or care about in the least.

Just the government taking their extra few pounds of flesh for retribution, rather than any effective policy with realistic and worthy objectives.

pfbz

I think it was their "lets roll coal" mode that turned up the heat on them a bit...

I'm all for performance mods, but creating a tune mode specifically to belch huge amounts of diesel smoke on command is way more obnoxious than open pipes a 2 am.

BSO

Those diesels belching black smoke is bad news, but gases that are emitted from gas engines w/ controls removed may not be seen but they can't be good either.

If they decided to go after the rest of the tuners things could change quickly if they hammer a few of them. That's the choke point.

ace37

Valvefloat991

The tunes on modern turbocharged cars simply increase the boost to add power. That requires, of course, attendant changes in fuel delivery, spark timing, etc. But when driven at slow to moderate speeds, as cars are on the emissions test cycles, the calibration should be unchanged from stock, as are the exhaust emissions.

Of course when you go to 100 cpi cats, or remove them completely, that's no longer the case.