Air filter question

[klennop]

Do not use a KN oiled filter on your 4runner. The oil can contaminate the mass air sensor. This usually happens after it is cleaned and reoiled because the oil gets put on to heavy. I had this happen on my old Ford Thunderbird and I never could get the mass air sensor cleaned just right after that. Now on my Jeep Wrangler that does not use mass air my KN works great. Use oem or a dry type filter only.

Sounds to me like you over oiled your filter which can easily be done.

 

[DC Dude]

To prevent "over oiling," one should spray down the filter until there are no more white areas, as directed, and then allow to drip drain. Or, tap the oiled filter against a flat surface.

 

[Ross]

I would not use a K&N air filter. Here is a chart I grabbed from another forum. K&N is the last one on the graph.

air filter test duramax diesel at duramax-diesel.com

 

[03_4x4Runner]

This is on the performance section 'sticky".

http://www.toyota-4runner.org/perfo...14801-truth-about-aftermarket-airfilters.html

 

[PaulB-2006 T4R]

I have the TRD performance filter. But i never oiled it so it's dry in there.

Mike I respect most of your opinions but sorry you are asking for problems if you do not oil the TRD or K&N filter. The oil is needed to capture the small dirt particles, without the oil the filter is a bug catcher. If you are going dry get the AFe or a paper filter.

 

[Husker Z]

Guys, I mentioned it before, but check out the line of Amsoil Air Filters. They are dry, filter WAY better than standard paper filters and are high flow as well. They don't flow as free as K&N (but are VERY close), but as you know, that air flow comes at a price, either a fouled MAF sensor or worse, letting particles into your engine.

 

[KB084RUNNER]

I used a K&N on my Harley for one season then went back to paper OEM. Who wants to sit around and wash their air filter? Red oil dripping off the thing...IMO K&N filters are a big PIA. I buy Fram on Amazon on sale for $11 and change them every 20k. Oil UOA reports show no dirt getting past the Fram.

 

[T24TODD]

wow you guys really hate on the k&n.have a k&n in all my vehicles,bikes,4wheelers. Theres pros and cons to everything remember that, k&n is a very reputable company that has been providing high flow filters longer than ive been alive, if people have half the problems you guys degrade it to have why the hell have they sold billions of filters worldwide?
Im by no means saying there the best and am no spokeman for them but million mile warranty on a $44 filter, and pick up a couple hp and tq, pretty damn good. So every 20k, wash and reoil your filter takes 1hr done correctly and dried, ill live with. I do pointless things over a hr each day whats one more. If you oversoak it in oil and dont let it dry then yea itll pull oil into your intake and maf possibly causing a misread and cause the maf to go bad more quickly but use common sense,read the 2 sentence directions, let dry no worries...that is all

 

[klennop]

wow you guys really hate on the k&n.have a k&n in all my vehicles,bikes,4wheelers. Theres pros and cons to everything remember that, k&n is a very reputable company that has been providing high flow filters longer than ive been alive, if people have half the problems you guys degrade it to have why the hell have they sold billions of filters worldwide?
Im by no means saying there the best and am no spokeman for them but million mile warranty on a $44 filter, and pick up a couple hp and tq, pretty damn good. So every 20k, wash and reoil your filter takes 1hr done correctly and dried, ill live with. I do pointless things over a hr each day whats one more. If you oversoak it in oil and dont let it dry then yea itll pull oil into your intake and maf possibly causing a misread and cause the maf to go bad more quickly but use common sense,read the 2 sentence directions, let dry no worries...that is all

I agree 100%

 

[klennop]

I used a K&N on my Harley for one season then went back to paper OEM. Who wants to sit around and wash their air filter? Red oil dripping off the thing...IMO K&N filters are a big PIA. I buy Fram on Amazon on sale for $11 and change them every 20k. Oil UOA reports show no dirt getting past the Fram.

Really....you ride a fricken Harley and you are whining about washing your air filter. How much time do you take polishing your chrome on that Harley vs riding it. If you had oil leaking off your K&N your DEFINITELY over oiled it, are you sure it wasn't leaking from your bike?

 

[Jerrydog]

Toyota built my engine, not K&N so Id like to think that they did a decent job designing an air filter for it. The reliability and longevity of these vehicles seems quite independent of aftermarket air filters so Im not worried there either. Horsepower increases are likely only to be seen at higher rpms where airflow can make a big difference; my truck rarely sees over 3k rpm so again, whats the point. I also have no real interest in cleaning and re-oiling a filter...played that little game with my dirtbike and no more. AFE and TRD full intake kits are pretty nice and I cant say I wouldn't like one; Id just rather spend the money on a bona fide tangible improvement like a bumper or beefier skid plates.

LOL Toyota designed your engine and dozens vendors made parts that were assembled along wit some toyota parts to make the engine. Toyota does not however make the airfilters. Independant testing agencies have confimed that filter manufacturers like K&N and other do infact make filters that are as good and often better performing than the OEM...

To each there own, if stock paper filters work for you then cool, if you want a better performing filter and possibly more HP and Torque (questionable) get a better filter.

 

[97BlackAckCL]

LOL Toyota designed your engine and dozens vendors made parts that were assembled along wit some toyota parts to make the engine. Toyota does not however make the airfilters. Independant testing agencies have confimed that filter manufacturers like K&N and other do infact make filters that are as good and often better performing than the OEM...

To each there own, if stock paper filters work for you then cool, if you want a better performing filter and possibly more HP and Torque (questionable) get a better filter.

:iagree: all you have to do is go to an auto parts store that has one of the K&N demos and see how much better the airflow is through them, frankly I love my K&N, I noticed a decent improvement in performance when I added it as well. Like you said, to each their own, but personally, I have K&N filters on both my vehicles

 

[Ross]

:iagree: all you have to do is go to an auto parts store that has one of the K&N demos and see how much better the airflow is through them, frankly I love my K&N, I noticed a decent improvement in performance when I added it as well. Like you said, to each their own, but personally, I have K&N filters on both my vehicles

The ones with a ping pong ball? The ones I have seen like that show the ping pong ball floating higher, but that ping pong ball is always more dirty that the other one. We also have no idea who makes the other filter, if it is even truly is a filter for a vehicle.

 

[PredBlue]

I checked my air filter this weekend after we finally had rain to wash off all of the road salt. Around here in this part of the Midwest there has been so much salt residue between snow storms that there are huge clouds of salty haze when the roads dry off---enough that you can taste it when driving. I shook the air filter and there was a bunch of super fine salt dust that fell out. The filter wasn't particularly dirty looking at about 20k miles, but I figured that salt residue clogging the filter or getting through it and into the engine would be about the worst thing for an engine so I replaced it.

Thought I might give a heads up to fellow "snow belters" to check it out if you live in areas were there was a lot of salt residue flying around all winter.

 

[97BlackAckCL]

good info i will have to check my k&n

 

[krravi]

I am just curious how a filter can be high flow and yet capture the dust particles. I am guessing that these filters deem such micro particles as no harm to engine, whereas the OEM guys have found a perfect balance between capturing dust and letting air flow.

I will stick to OEM and have for the past 4 years and i get 20 mpg in city driving conditions and enough power for my needs.

Too much mod can end up screwing up your expensive vehicle.

But to each his own....

 

[Husker Z]

I am just curious how a filter can be high flow and yet capture the dust particles. I am guessing that these filters deem such micro particles as no harm to engine, whereas the OEM guys have found a perfect balance between capturing dust and letting air flow.

I will stick to OEM and have for the past 4 years and i get 20 mpg in city driving conditions and enough power for my needs.

Too much mod can end up screwing up your expensive vehicle.

But to each his own....

You are correct, you can't have your cake and eat it too when it comes to air filters. I'm like you, I'll sacrifice a little knowing that particles are staying out of my engine, that's what I LOVE about the AmsOil filters, it's a perfect balance if you ask me.

 

[BBV]

I bought the Amsoil Ea Air Filter last night. I've used these every vehicle that they are made for and love them. They are 4 year 100K mile filters and don't require oil, so you don't have to worry about them fouling your MAF Sensor.

AMSOIL Ea Synthetic Nanofiber Air Filter (EaA)

clicked that link and then did a model search and its telling me its a WIX air filter, not an Ea.... am i missing something?