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07-24-2009, 12:22 PM | #1 |
73 Centurion droptop 455
Drives: 2009 S Sedan Join Date: Oct 2008
Location: Phoenix Arizona
Posts: 64
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Air filter,primary and secondary
Anyone replace the primary and secondary air filters?
Anyone have the mileage interval? I ordered some wix secondaries,but the primary's seem mighty expensive. |
07-24-2009, 02:02 PM | #2 |
Drives: '14 GT86, '08 Vitz Join Date: Dec 2006
Location: Central Valley, CA
Posts: 9,873
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Primary and secondary? Do you mean the carbon trap?
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07-24-2009, 02:33 PM | #3 |
Half a Bubble Off Plumb
Drives: 2009 Yaris Sedan Join Date: Mar 2009
Location: Bristol, Tennessee, USA
Posts: 1,593
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What?
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07-24-2009, 02:35 PM | #4 |
Drives: Silver 2007 3Dr - Gryph Join Date: Jul 2007
Location: Kansas City, MO, USA
Posts: 310
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Yeah... the Yaris only has one air filter for the engine, and one for inside the A/C in the cabin. There's no primary or secondary to it, just one filter for each entirely-seperate purpose. And both are bone-simple to change and cheap as dirt.
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07-24-2009, 02:44 PM | #5 |
73 Centurion droptop 455
Drives: 2009 S Sedan Join Date: Oct 2008
Location: Phoenix Arizona
Posts: 64
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http://www.car-stuff.com/store/?N=11...725+11921+9157
I guess I ordered 4 wix primary filters at about $10 each. I kept running into the listing for secondary filters,and couldn't figure out what they were talking about. I'm guessing maybe it's the plastic cover? The filter comes out easily,but I imagine it's easy to crack the hinge/housing. Just a heads up. |
07-24-2009, 02:50 PM | #6 |
Half a Bubble Off Plumb
Drives: 2009 Yaris Sedan Join Date: Mar 2009
Location: Bristol, Tennessee, USA
Posts: 1,593
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I haven't looked in my air box yet. I've seen filters before that had a foam filter to catch the bulky coarse dirt before the air goes through the finer paper filter that removes the smaller dirt particles but clogs faster.
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07-24-2009, 07:14 PM | #7 |
Drives: 2007 Yaris Sedan Join Date: Apr 2009
Location: CT
Posts: 276
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The break down on ToyoDIY.com actually shows a sub filter in the top of the housing.
I never even looked in the top part for a second filter. |
07-24-2009, 09:37 PM | #8 |
ULTIMATE
Drives: 09 5dr LB, 2x 08 3dr LB Join Date: Oct 2008
Location: USA, CT
Posts: 13,460
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The part shown on ToyoDiy is a white mesh filter that is probably there to keep anything that gets freed up when the filter is changed from making it to the MAF sensor. The EPC doesn't show it as being a separate part from the air box, so it is probably not intended to ever be replaced.
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07-26-2009, 06:51 PM | #9 |
Drives: 08 Sedan Join Date: Oct 2008
Location: Tyler, TX
Posts: 899
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It's called a Carbon Trap.
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08-25-2009, 08:13 PM | #10 |
Drives: '09 Yaris carmine red 2d HB Join Date: Jun 2009
Location: Middletown, NY
Posts: 1,502
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I just replaced my air filter with a K&N.
I must admit that I'm a bit piuzzled by this secondary fillter. I could understand if airflow was from top to bottom as it would keep anthing from "falling" into the intake. However, since air flow is from bottom to top, it doesn't make much sense to me. What is ment by it being a "carbon trap"? |
08-25-2009, 09:28 PM | #11 |
Carbo trap keeps stuff from going into the engine that doesn't belong, and stuff from leaving the engine the wrong way. Pointless, IMO. I took mine out right away, and had no problems. Take yours out, and try blowing through it. It's kinda hard. Now, imagine your engine going through that same strain. The less work the engine does to create power, the more power it has to put to the ground.
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08-25-2009, 11:06 PM | #12 | |
Drives: '09 Yaris carmine red 2d HB Join Date: Jun 2009
Location: Middletown, NY
Posts: 1,502
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Quote:
I agree that it limits air flow. Perhaps that's precisely what it's for? Maby it's part of toyta's "tuning" to limit performance to increase MPG? |
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08-26-2009, 01:07 PM | #13 | |
Drives: 08 Sedan Join Date: Oct 2008
Location: Tyler, TX
Posts: 899
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Quote:
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08-26-2009, 02:38 PM | #14 |
Drives: '09 Yaris carmine red 2d HB Join Date: Jun 2009
Location: Middletown, NY
Posts: 1,502
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08-25-2009, 11:51 PM | #15 |
Drives: 08 Yaris Sedan Join Date: Oct 2008
Location: California - Bay Area
Posts: 2,773
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I think its there just as a precation. Which is why you have a noticible difference swapping to a performance intake verses stock. Because there is so much restriction to begin with.
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08-26-2009, 12:20 PM | #16 |
Drives: '09 Yaris carmine red 2d HB Join Date: Jun 2009
Location: Middletown, NY
Posts: 1,502
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Ok.... I just came from the Toyota dealer. I got my initial oil change using the VIP card they gave me. They are right down the road and have been changing the oil on my Celica for years. With a cupon it's realtively cheap also.
Anyway, I just happen to run into the service manager and I asked him about the purpose of the secondary air filter. Now, he has been there for years (a major dealer in the NE) and we have had a few conversations in the past. However, as far as the secondary filter, he admitted to me that he really didn't have clue about its purpose. When I ran by him the things I heard it might be for (carbon trap etc) he when on to say that he has heard all that but, he has never heard or read anything official from Toyota to indicate what it was for and as far as he knows, it has nothing to do with emissions, etc as some suspect. So, the mystery continues. BTW, the K&N filter definately made a dfference in throttle response and is well worth it. Last edited by RedRide; 08-26-2009 at 01:02 PM. |
08-26-2009, 02:55 PM | #17 |
Drives: '09 Yaris carmine red 2d HB Join Date: Jun 2009
Location: Middletown, NY
Posts: 1,502
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I just found this and it seems to shed some light on the matter:
A C&P--- ".....;I have to rant...I love how everyone calls the carbon filter a "secondary air filter" even though it's not an air filter at all. It just keeps gas fumes from leaving the engine and adding to pollution. Those fumes get trapped in the carbon and then sucked back into the engine when you start it back up. So by removing the carbon filter, everyone's just venting those fumes into the atmosphere instead of using them when the engine is running. Might as well leave the gas cap off too. Personally, when I pay for all that gas I like to use it in running the engine rather than just letting it evaporate into the air." I then read that this was done mainly to apease Califorinia's stricker emissions standards. If all this is true, removing it will do no harm and will not effect emissions tests, except maby in California. |
08-26-2009, 03:09 PM | #18 |
Drives: '14 GT86, '08 Vitz Join Date: Dec 2006
Location: Central Valley, CA
Posts: 9,873
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So would it really be worth it to remove it and cause more pollution? I doubt it that it would cause a noticeable power increase.
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