Has anyone installed a cold air intake with good results on improved fuel efficiency?

45

Asked by Mar 02, 2008 at 10:04 PM about the 2003 Toyota 4Runner Limited 4WD

Question type: Car Customization

I'm not interested in improving horsepower or needing a cool throaty sound.  I like the quiet ride I have now just would like some extra MPG.

9 Answers

6,665

The cold air intake is to help increase HP, when you increase HP, you lose MPG in most cases. Normally I have found that when you put a cold air in a car you get a increase hp and most of the time you lose MPG. The 4Runner isnt known for fuel mileage as almost all the ones I have seen get about 15-18MPG. If you keep it tuned, and do he oil changes (5w30, helps a little). Also all those "fuel wonder mileage increase" add ons dont work, as all have been disproved through the EPA or independent testing (Mythbusters even did a few shows on this subject). But if you go to http://www.fueleconomy.gov/ you can read up on it. Just keep it tuned and stay on top of the service. I have seen my brothers 4Runner get just over 20MPG on the highway. Best of luck.

1 out of 1 people think this is helpful.
41,565

I have found a K&N air filter will give a slightly better MPG and different intake note, as it allows more air through to the engine.

1 out of 1 people think this is helpful.
105

Cold air intakes increase overall engine efficiency, so it will increase horsepower, torque, and MPG's. However, the MPG most likely won't be significant enough for you to notice it right off the bat (maybe about 0.5 MPG better)

2 out of 2 people think this is helpful.
115

CIA is a waste of time and money. With a dremel tool and a little know how, you can do this modification for increased efficiency, power, and a nice tone. http://www.yotatech.com/~corey/tech/dr_z_intake/dr_z.htm

5 out of 5 people think this is helpful.
1,035

More air into the engine, more fuel to keep it at stochiometric. It will take you a long time to make up the money for any (if at all) fuel mileage gains you will see. Some vehicles benefit, some do not, yet the parts get marketed as they do the same thing for every vehicle. Every vehicle has a different design for their intake, not all are restrictive.

20

I own a 2003 4Runner V6 LTD and managed to improve my MPG considerably by doing some surprisingly simple things. Firstly I had the engine flushed at CAA with a non chemical pressurised charged particle fuel flush, then I replaced all of the spark plugs with E3 high efficiency plugs, vaccumed the air filter and lastly pumped up the tire pressure (during the summer months only!) to max which on my tires was 46PSI. These changes which in total cost me about $200, increased efficiency from 400km per tank to 600km per tank, a 50% increase! And they remained in effect afterwards, they weren't temporary. I also noticed that I retained pretty much the same level of fuel economy after these changes independent of how I drove, all in all well worth the money spent :)

1 out of 1 people think this is helpful.
20

Oh, I checked out the pros and cons of air intakes too, but soon came to realise that it really isn't a good idea as the only way to increase air is to decrease protection and allow more damaging particles into your engine. Not really a good idea if you want your 4Runner to last.

20

Oh and the last thing I did was change the oil filter to a 'tough guard' and the oil (which I bought at a US Walmart sale for cheap) to Mobil1 0W-30 Fully Synthetic.

1 out of 1 people think this is helpful.
345

I put a Stainless Steel racing intake w/ an open air K&N element, and let me just say for less than $100 K&N dynoed the set up at 9.4 hp for the 4.0L......should be close to the same for the 4.7L. Oh and have you figured out at which speed the best mpg is achieved? My sweet spot seems to be 85mph, consistantly 24mpg+

2 out of 2 people think this is helpful.

Your Answer

Add photo

Related Questions

  • 3.0L V6 Engine Performance 16 answers

    is there any thing i can add or do to my 3.0L efi V6 engine in my 94 4runner to make it faster?

    1994 Toyota 4Runner 4 Dr SR5 V6 4WD SUV

    -

    Car Customization

  • performance improvement recommendations 8 answers

    My 1974 Toyota HiLux has only 103k miles, perfect compression in each cylinder, a good tune-up, no misfiring or other indication of engine problems. But it is SLOW!!! I cannot even maintain 55 mph on ...

    1974 Toyota Hilux

    -

    Car Customization

  • what can I do to my '09 Toytota Corolla to make it have more "pep" to the engine when I push on the gas pedal? 1 answer

    looking for something to do to the engine of my car so it accelerates faster. any suggestions?

    2009 Toyota Corolla LE

    -

    Car Customization

  • turbo 9 answers

    hey i was looking for a little more kick out of my alvalon, and wondering how to do it..... would u suggest a turbo or supercharger??? Or are there any decent N/A mods out there???

    2006 Toyota Avalon XLS

    -

    Car Customization

  • Low fuel efficiency of 1.8 engine and cracking noise comes out at the ignition- Why? 2 answers

    Recently I bought Toyota Allion 1.8(engine capacity) -2008 model. Although most of the time I try to run while the green eco light is on, the fuel efficiency drops below 8km/l ( around 7.5) as it indi...

    2008 Toyota Allion

    -

    Maintenance & Repair

4Runner

Looking for a Used 4Runner in your area?

CarGurus has 20,549 nationwide 4Runner listings starting at $2,295.

ZIP:

Search Toyota 4Runner Questions

Toyota 4Runner Experts

#1 Kurt Burton
Kurt Burton
Reputation 1,140
#2 azurro
azurro
Reputation 650
#3 kbro
kbro
Reputation 600
View All

Related Models For Sale

Used Toyota Tacoma
619 Great Deals out of 35,127 listings starting at $2,155
Used Toyota Highlander
475 Great Deals out of 25,073 listings starting at $1,500
Used Jeep Grand Cherokee
845 Great Deals out of 68,679 listings starting at $864
Used Toyota Tundra
584 Great Deals out of 30,729 listings starting at $2,637
Used Chevrolet Tahoe
772 Great Deals out of 28,452 listings starting at $1,500
Used Toyota RAV4
642 Great Deals out of 61,987 listings starting at $2,450
Used Toyota Land Cruiser
21 Great Deals out of 1,249 listings starting at $2,995
Used Toyota Sequoia
164 Great Deals out of 5,986 listings starting at $1,495
Used Honda Pilot
460 Great Deals out of 19,639 listings starting at $599
Used Ford Explorer
936 Great Deals out of 73,995 listings starting at $750
Used Nissan Pathfinder
410 Great Deals out of 24,817 listings starting at $999
Used Ford F-150
2,690 Great Deals out of 212,354 listings starting at $1,000
Used Jeep Wrangler
392 Great Deals out of 19,081 listings starting at $3,000
Used Toyota Camry
1,091 Great Deals out of 96,268 listings starting at $1,250

Used Cars For Sale

2017 Toyota 4Runner Limited 4WD For Sale
1,062 listings starting at $42,059
2016 Toyota 4Runner Limited 4WD For Sale
3 Great Deals out of 1,183 listings starting at $30,991
2015 Toyota 4Runner Limited 4WD For Sale
6 Great Deals out of 197 listings starting at $31,967
2014 Toyota 4Runner Limited 4WD For Sale
4 Great Deals out of 209 listings starting at $30,799
2013 Toyota 4Runner Limited 4WD For Sale
7 Great Deals out of 124 listings starting at $26,467