I removed the Carbon Filter and installed an Oiled K&N filter and have experienced absolutey NO problems. I actually think im running a bit lean so Im going to reset my ecm this weekend and see if that helps.
__________________ Black 2007 D/C Limited 4x4, seems to have ALL the options, Flowmaster Dual Delta 40's, K&N drop in filter, Rhino Liner', 3" frt 1" rear Daystar leveling kit, BFG Radial All Terrain TA's 305x65x18, Moto Metal M0951's in Chrome 18x9. Fully DeBadged , Stebel horn, C/W grill, TRD Swaybar, Wet O's, Craven Speed Stubby Antenna, 10,000 lb winch, H11 bulbs, Production date 8/07
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Black Mod Headlights 1997 Chevy Tahoe Sport 4x4 2008 Sequoia Ltd. Slate Metallic (purchased on 3/28/09)
"Some people spend an entire lifetime wondering if they made a difference. The MARINES don't have that problem." President Ronald Reagan 1985
Isn't airflow going: filter->carbon filter->MAF? If so, then it would offer a bit of protection from over-oiling a filter.
Thats also what I thought and why I wondered if removing the carbon filter and using a oiled filter posed any risk. The K&N link that Hotwheels provided seems to indicate there really isn't any real risk of oil getting on the MAF.
Just did it.
Disconected the - for approx 10 min. Truck started ,then died after 20 sec. or so, then I started it again and so far so good. Seem like a little more low end grunt, but only drove a mile so far.
Last edited by bilztrd; 06-27-2008 at 03:56 PM.
Reason: spelling
I just did it and ran my truck 30 miles . I unhooked battery for one half hour,truck started right up no problem. I will never know if this works or not my milage varies to much. I just hope this helps when I tow, this is when one mpg will help a lot.
I get an honest 19+ mpg on the highway on a regular basis, however I dont drive 80 mph on road trips more like 65. If many of you would slow the hell down your mileage would be much improved. Cant imagine getting 15 mpg on the highway in these trucks driving at a reasonable speed.
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07 Tundra DC TRD 4WD 5.7L Desert Mica
I get an honest 19+ mpg on the highway on a regular basis, however I dont drive 80 mph on road trips more like 65. If many of you would slow the hell down your mileage would be much improved. Cant imagine getting 15 mpg on the highway in these trucks driving at a reasonable speed.
my 15.7 comes from back country roads doing 60 to 65, and city driving. I drive 55 daily miles to and from work, and its 50/50 country roads to city roads. I do have a trip up to WI in a couple weeks, so I will get an accurate measure of my MPG.
__________________ CBTMA Member, 2008 Tundra DC, SR 5, Salsa Red Pearl, 5.7, Running Boards, Bed Liner, TRD Package,White LED Lights in Interior, Alpine SPS -1752 Speakers, Extang Tonneau
Doesnt more air going in require more fuel and that in turn would lower your MPG??
Not necessarily. If you can reduce the amount of energy required to draw in air for combustion, and then expel exhaust gases you can realize an improvement in fuel economy. This is because the power that was being used to do those other two functions can be used for other work. The gains won't be huge, but every little bit helps.
If economy was better if airflow were restricted we would have tiny air filters. If you would like to experiment by all means take some cardboard and cut it to shape to block a bunch of air flow then stick it in front of your air filter. Let us know what your results are.
I can,t believe this mod. I seem to of gone from 15 to 18.2 on interstate at 60 miles per hour. If this holds I'm going to be one happy camper. Now if I can increase my tow miles to 13 I'll be real happy.
Removed the HC filter and reset the ECM for 10 minutes. Already had a K&N high flow filter on a 4x2, stock sespension, LTD DC. Just completed a 142 mile trip for work on highways and interstate (set cruise at 72) and averaged 19.2mpg round trip. I will be doing a 260 mile trip Monday.
The biggest change I notice was the throttle response. Much better and smoother now. That alone made the 30sec. mod worth it. Now if only these aftermarket chips (Unichip, NYC) would actually increase the mpg. I might be able to get to 22mpg!
Are all you guys serious? 19.2 MPG!!!??? I'm green with ENVY. My darn truck just loves taking money from my wallet. I get 14.8 MPG and it STAYS there! I removed the running boards and it gets 14.7 MPG, but with the factory running boards installed, it gets 14.8 MPG. Weird, must be due to aerodynamics factor or something. I will try the HC mod one day. And go with the unplugged ECM for 10 minutes as many of you doctors recommend it.
Thanks.
I can,t believe this mod. I seem to of gone from 15 to 18.2 on interstate at 60 miles per hour. If this holds I'm going to be one happy camper. Now if I can increase my tow miles to 13 I'll be real happy.
There is NO way removing the carbon filter increased your fuel mileage by that much. Absolutely no way. I think you subconsciously biased your test by wanting to get better mileage and thus changed your driving habits to see how good of mileage you could get after this mod. This is a very common bias in all experiments, and is one of the very fist things you discuss in epidemiology and statistics courses. Short of doing a "blinded" experiment, everyone is going to notice an increase in throttle response because that's what they think they're supposed to notice. Just like giving a placebo.
I just averaged 19.7mpg on a 940mile round trip with the HC filter in place. Kept the cruise set at 67-74mph depending on the speed limit on the highway. I can't see removing the HC filter giving me another 1mpg but, I may try it next trip. It would be nice to have a 400 horse, 5000lbs rolling brick that gets 20+mpg on the highway.
Re: 19.8mpg after HC removed!
Isn't airflow going: filter->carbon filter->MAF? If so, then it would offer a bit of protection from over-oiling a filter.
CBTMA Member, 2008 Tundra DC, SR 5, Salsa Red Pearl, 5.7, Running Boards, Bed Liner, TRD Package,White LED Lights in Interior, Alpine SPS -1752 Speakers, Extang Tonneau
Linear Mode
