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K & N cold air intake worse gas mileage

Discussion in 'Performance and Tuning' started by glaziers27, Jan 16, 2013.

  1. Jan 23, 2013 at 2:55 PM
    #21
    dually

    dually Low and slow

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    Interstate underpass
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    You have to think 'placement of MAF'. Which is behind a free-er flowing filter. Thus the MAF is reading increased CFM of air.
     
  2. Jan 23, 2013 at 3:10 PM
    #22
    Bobbb

    Bobbb "Rumors of Bob, but never Bob. It is Bob, right?"

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    This was my first thought. OP didn't say when they did the swap. Might have been around the same time their usual watering hole switched over to crap blend for the season.

    I'm still stock on my '11, but I did do the K&N swap on my '04 Wrangler and it gave me a 2-3 highway MPG boost even though K&N said not to expect one. Or course my Taco has even more electronic crap on it than the Jeep did. :(
     
  3. Jan 23, 2013 at 3:13 PM
    #23
    Aw9d

    Aw9d That one guy

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    They come over oiled because they sit on the shelves for years before they get sold typically.

    Once you get a new one, take it out of the bag and wash it good. Then lightly, lightly, lightly oil it. Clean the MAF as well. 99% of peoples problems with K&N is due to them soaking the piss out of it in oil. I've ran K&N's in everything I've ever owned, never once had an issue.
     
  4. Jan 23, 2013 at 3:35 PM
    #24
    chris4x4

    chris4x4 With sufficient thrust, pigs fly just fine. Moderator

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    No its not. I have monitored the GPS's (grams per second) readings from the MAF with OEM intake, and others, and there is no change. The only thing affecting the reading is the amount of throttle thats open. The air filter is virtually invisible to the engine.
     
  5. Jan 23, 2013 at 3:36 PM
    #25
    chris4x4

    chris4x4 With sufficient thrust, pigs fly just fine. Moderator

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    To add, colder air holds more O2, thus causing the engine to run more fuel. MPG generally suffer in the winter because of, not only the crap gas, but also the colder, denser air.
     
  6. Jan 23, 2013 at 3:45 PM
    #26
    dually

    dually Low and slow

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  7. Jan 23, 2013 at 3:48 PM
    #27
    chris4x4

    chris4x4 With sufficient thrust, pigs fly just fine. Moderator

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    I understand what you are saying. What Im telling you is, The GPS were not affected by the kind of filter installed. This is a direct measure of how much air is flowing thru the MAF. If more air was in fact going into the engine, it would have shown an increase in the GPS.
     
  8. Oct 10, 2017 at 6:05 PM
    #28
    skitzobeve42

    skitzobeve42 Member

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    Hey guys, I just installed a K&N 63 Intake on my 2017 TRD sport. I was getting 23-24 highway mpg but no I am getting 20-21 highway mpg if I’m lucky. I take the same route everyday. I’m not sure why I am getting less MPGs. Does anyone have any suggestions ?
     
  9. Jul 16, 2019 at 2:39 PM
    #29
    Jasonsfirsttaco

    Jasonsfirsttaco Well-Known Member

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    I installed a CAI on my 07 2.7l taco and the MPG went from 20 to 16.5-17
     
  10. Jul 17, 2019 at 6:28 AM
    #30
    Jasonsfirsttaco

    Jasonsfirsttaco Well-Known Member

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    I just ordered a replacement air box and resonator, I'm not dealing with this BS gas mileage I'm just putting in a new stock system. For the 2 HP past 3k RPM and a little louder its NOT worth it at all. Couldn't find anything from any junk yards so I had to order the parts from ebay. Luckily I didn't get a K&N so I didn't waste 350 bucks.
     
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    #30
  11. Jul 17, 2019 at 6:30 AM
    #31
    Jasonsfirsttaco

    Jasonsfirsttaco Well-Known Member

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    Put the old intake back in, for the little bit of HP you're gonna get on the higher RPM range its not worth the drop in gas mileage at all.
     
  12. Jul 17, 2019 at 7:42 AM
    #32
    Torspd

    Torspd Tor-nication

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    HP Tuner. Nuff said.
     
  13. Aug 20, 2019 at 6:44 PM
    #33
    1997tacomav6

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    V6 5sp,RegCab,TRD Supercharger, 1.9” pulley, methanol injected Haltech ECU, AC TRD supercharger,(MUST DO) TRD supercharger ported, every 125,000- 150,000 needs rebuild Projector headlights HID 5 speed manual Amsoil for all drive train Smaller 2” pulley, (MUST DO) 2004 DESNO fuel injectors, zero ping ping, 2004 side door mirrors Dick Cepek Rims, Michelin tires LTX, ( that last 100,000 miles) Now running Dynopro ATM mud and snow tires KN cold air intake Cat back exhaust with ss exhaust tip, Raised exhaust tail pipe to 2" below body line Optima*dry cell battery,red top Alpine sirius radio, 200 watt amp, focal is165 split door pod speakers Focal door speakers Subwoffer behind seat Viper alarm, Electric Locks Dark tinted windows, bucket seats corbeau lg1 Tacoma Rubber floor mats TRD fender extenders, Bilstien shocks, King shocks nerf bars, add a leaf for rear springs trailer iv hitch, electric brake control, Drilled slotted brakes, High carbon steel (MUST DO) EBS green stuff 7000 series pads(MUST DO) TRD engine oil cap TRD stick shift, Marlin crawl shift kit. Rear sliding window 2002 4Runner functional hood scoop cut into Tacoma hood, 4Runner dual overhead map light Gentex Auto dim + Compass + Temp, garage,rearview mirror Snow Methonal kit stage 2 Custom 3 core aluminum radiator Linex bed liner Haltech stand alone ECU, Intake supercharger gauge. Stainless steel brake lines, Custom leather wrapped steering wheel,
    X2,
    I have had a K&N SINCE NEW, 600,000 miles, never had a problem
     
    Aw9d[QUOTED] likes this.

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