Check engine light came on today

MICAHS97m8

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I just got done doing the plugs, coils, and oil on my mark a little bit ago. When I started it up the check engine light came on. I took it to advanced auto and had them run the codes. It came up "IAT sensor 1 circuit high output". He reset the computer for me (i know its illegal J) and it didn't come back up on the way home. They said it might be from the drastic change in performance. I changed the original spark plugs and coils (67k miles on them) with NGK iridium IX plugs and HGK coils. Running Castrol Syntec 10-w30 and a fram filter. Getting a K&N next week hopefully. Anyway, has anyone got this code before?
 
Be VERY careful oiling the K & N... do NOT use too much or you'll coat the sensor wire on the MAF.... better to use too little than too much.
 
Thanks for the advice. I have used K&N's before and just didn't oil them. I haven't kept a car long enough to worry about upkeep. lol. This mark is going to be with me for awhile. I'm thinkin Supercharger;)
 
Be VERY careful oiling the K & N... do NOT use too much or you'll coat the sensor wire on the MAF.... better to use too little than too much.

better to just stick with the paper filter, there is no performance gain swapping the paper for k&n.
 
Source of Info Please!

Source of Info Please!

better to just stick with the paper filter, there is no performance gain swapping the paper for k&n.

Please explain why the conventional paper air filter is as good when it comes to performance as the K&N? Is there a study that you can point to, or is that your opinion based on your own experiences and/or test results.

Thank you
 
Please explain why the conventional paper air filter is as good when it comes to performance as the K&N? Is there a study that you can point to, or is that your opinion based on your own experiences and/or test results.

Thank you

Back in the day there was an automotive engineer on here that went by JW, he designed the transmissions in our Marks and a lot of people use his paper to mod their trans. He dyno tested the k&n vs paper, the k&n actually lost a few HP. You can Google search for similar results in other cars. Also the k&n usuly lets in more dirt when new.
 
Clean Intake or Dirty Exhaust?

Clean Intake or Dirty Exhaust?

Back in the day there was an automotive engineer on here that went by JW, he designed the transmissions in our Marks and a lot of people use his paper to mod their trans. He dyno tested the k&n vs paper, the k&n actually lost a few HP. You can Google search for similar results in other cars. Also the k&n usuly lets in more dirt when new.

Thank you for your reply. However, I would like more information than you have provided. I am not saying that you are wrong, its just that you have not adequately cited your information source.

When you say "K&N usually lets in more dirt when new," you do not cite a study that confirms that alleged fact. I do not work for K&N, but I have used their products in the past. I want to know if they have been using depceptive trade practices in promoting their filters.

Again, if you are merely stating an opinion, that is just fine, but please clarify for me.

Thank you
 
I've run it 100 miles or so and the light hasn't come back on. Thats the good news. The bad news is i just jinxed myself. Passed inspection today.
 
Thank you for your reply. However, I would like more information than you have provided. I am not saying that you are wrong, its just that you have not adequately cited your information source.

When you say "K&N usually lets in more dirt when new," you do not cite a study that confirms that alleged fact. I do not work for K&N, but I have used their products in the past. I want to know if they have been using depceptive trade practices in promoting their filters.

Again, if you are merely stating an opinion, that is just fine, but please clarify for me.

Thank you

I believe both sides are correct...let me explain.

Back when the "wet" filters came out, they were indeed better than sliced bread. But since then, some premium brands have come out with space age fiber materials that do indeed outperform the wet gauze material. Wix, to name one.

And dry filters being able to collect more and smaller particles is almost common knowledge. Even the guys at K&N don't deny it anymore if you ask them about it.
 
Thank you for your reply. However, I would like more information than you have provided. I am not saying that you are wrong, its just that you have not adequately cited your information source.

When you say "K&N usually lets in more dirt when new," you do not cite a study that confirms that alleged fact. I do not work for K&N, but I have used their products in the past. I want to know if they have been using depceptive trade practices in promoting their filters.

Again, if you are merely stating an opinion, that is just fine, but please clarify for me.

Thank you

This is a popular source:

http://www.bobistheoilguy.com/airfilter/airtest1.htm

K&N trade practices are just as deceptive as additives like slick50, and the oil companies inferring that higher octane will give you more HP. Their claims of added HP and MPG for just swapping a new clean OEM paper filter out for one of their filters are negligible at best.

I know tuners who have also tested a new k&n filter on a c5 LS1 Corvette vs a newOEM paper filter, negligible HP differance.
 
...and the oil companies inferring that higher octane will give you more HP...

Don't know about anyone else, but I tried a concoction of Napthalene, WD-40, and B-12 cleaner and averaged 17-18mpg at 75mph going from LA to San Diego in my H2. Anybody who knows about H2's knows that that is a miracle number. I've read that that mixture runs at around 105 octane. Not sure about any hp gains though.
 
Let's rename this thread "K&N vs. Paper".:laugh: I have owned 23 cars in the past 7 years and never noticed a difference in peformance between the two. If the filter was dirty when I bought the car, a new filter was an improvement. Cold air intakes do improve performance and mpg's. Regardless of the brand, the cone shape lets in a lot more air.
 
OK, I am glad that we got to the bottom of this debate.

Now it is time to name the paper air filters that out perform the K&N in terms of air flow and in stopping dirt from getting into the combustion chamber.

In terms of cost over time, is the K&N more cost effective since it is a re-usable filter?
 
Usually not because - 1. You have to purchase the "recharge" kit. 2. After they are "recharged" by the inexperienced, they have to take the car in to have the crap taken off the MAF - which usually will be a replacement because the mech would want to make more money from this dumb cluck!
 
Usually not because - 1. You have to purchase the "recharge" kit. 2. After they are "recharged" by the inexperienced, they have to take the car in to have the crap taken off the MAF - which usually will be a replacement because the mech would want to make more money from this dumb cluck!

And why go through that hassle when the paper filters out dirt better and any flow benefit for the oil gauze filter is so negligible that probably in most if not all cases it can't even been measured on a dyno.
 
Usually not because - 1. You have to purchase the "recharge" kit. 2. After they are "recharged" by the inexperienced, they have to take the car in to have the crap taken off the MAF - which usually will be a replacement because the mech would want to make more money from this dumb cluck!

And the fact that the more contamination flowing through the wet filters causes more sludge build-up in the engine.
 
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