DIY: Secondary Air Filter Removal

OK, but what if you do overflow. Doesn't it go into the canister?

 

You really have to struggle to overfill your gas tank to the point of damaging your charcoal filter. Fill until it shuts off, and click 2-3 more times and you aren't even close to ruining the canister.

The purpose is to eliminate gas vapors from continually venting to the atmosphere like pre 1972 vehicles. Hardly a waste, and actually conservation of what was wasted gasoline.

You seem to jump to conclusions that are way off base. Which president since 1972 when closed gas tank systems where mandated are you referring to?

 

Sorry guys, I come from a state where they tried to outlaw owning Goldfish was a crime and now they are proposing rearview cameras as required by law. Sorry, in my view there are just too damn many laws/restrictions. Period.

 

Seems that is screwing up your judgment, and distorting your ability to understand basic ideas.

I'm Libertarian, but obviously there is no way auto manufacturers would have reduced emissions without laws, we live in a much cleaner environment with regulations, the free market fails at market signals to force reduction of pollution.

Just let them try to ban aluminum foil for hat making though.

 

My '69 Buick and '67 Chevelle had charcoal canisters. One looked like a cartoon bomb (round plastic) and one looked like a 1lb coffee can.
Emissions controls started in 1963 (under Kennedy).
Nixon formed the EPA.

 

That's not California... that is Federal.
Just like the TPMS, airbags, 3rd brake light, etc....

 

Closed tanks weren't national until '72, my '70 Challenger has an open tank with nothing more than a tube that runs down toward the ground. CA lead the way.

 

My '69 Camaro was like that, I figured it was an owner mod.

The Buick did have a couple of hoses routed into the wheelwell with dust caps on them (one of them leaked fuel if the tank was full when parked on an angle), but it did have a canister.

Other than that, they had PCV and the breather routed to the air filter housing. The Chevelle had an A.I.R. pump, the '69 models didn't have it.

 

Were these all CA cars?

 

Not sure where the Camaro was "born"... and it had been gutted and turned into a race car before I bought it. Didn't even have a heater.

The Buick was bought used in '72, it had been a company car prior (lease return), and the Chevelle was bought new in CA.

The smog pump came, went, and came again. I'm not sure about '68, but all '67 had them, and no '69 had them. It came back in '70 or '71.
Dad's '74 K5 Blazer had one (but no cat).

 

Amen! Oh wait, I might get fined for saying that. This isn't a Fed/State run site is it?

 

Stock thick ass air filter replaced w/ drop in aFe Pro Dry S.
Secondary (charcoal) filter ripped out & tossed
MAF screen ripped out and tossed
Not looking back!

 

I removed the "snow filter" off my truck today. I have a 2011 4.0, I just used a knife and razor to cut out the plastic tabs holding it in place. I noticed the engine can breath a lot easier now, Im sure it frees up some hp in the very high rpm. Hopefully it will get some better mpg. I also cleaned my MAF sensor and intake box while I had it all apart. Thinking of getting a drop in high flow filter next.

 

Cleaning a dirty MAF will help any vehicle. Pulling the secondary will make it only as fassst as you think it will.

 

just did this to my 08 prerunner very easy mod, and im sure after 73000 miles that my truck has it was restricting a little. Im sure I wont notice any gains besides hopefully a couple mpg extra!

 

The only way it might get restricted is if you had K&N type air filter. This is NOT a secondary air filter, it's a carbon trap for gasoline vapors and does nothing for filtration.

 

And of course there will be no extra couple mpg.

 

Turns out the truck had a k&n in it so I went to the dealer today and got a stock filter for 15$

 

So I went through this thread and didn't see anything about this effecting dust getting into the engine as it's just required for emissions. I am considering taking this carbon filter out on my '12 4cyl, and putting it back in when it comes time for me to get smogged.

Anything I need to know?