ATTN AT owners - Page 2 - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

rhood168 · 12-17-2012, 12:52 AM

Quote:

Originally Posted by Touge_ninja

Yeah it started with the intake...

If you bring it in, thats what they will blame.

m.box.design · 12-17-2012, 12:52 AM

I'm an AT owner and I have to say I've experienced this the last and current tank I'm on. My MPG has dropped to around the 21-22 mpg range, where as I was consistently getting 25-26 before. My driving habits have not changed nor have I made any adjustments/modifications. The only things that have changed is the weather/temperature, but can weather and temperature adversely affect MPG?

I also wonder if the quality of the gasoline being brought in is being changed. Last tank was SHELL and current tank is with 76.

DaJo · 12-17-2012, 12:58 AM

Quote:

Originally Posted by indesign

I'm an AT owner and I have to say I've experienced this the last and current tank I'm on. My MPG has dropped to around the 21-22 mpg range, where as I was consistently getting 25-26 before. My driving habits have not changed nor have I made any adjustments/modifications. The only things that have changed is the weather/temperature, but can weather and temperature adversely affect MPG?

I also wonder if the quality of the gasoline being brought in is being changed. Last tank was SHELL and current tank is with 76.

Could be the winter blend...

Estey · 12-17-2012, 12:59 AM

if the area you live in has a lot of hills it will worsen your mpg. thats my problem. i probably get around 24 mpg in the city

cdo221 · 12-17-2012, 01:02 AM

I get anywhere from 25-28 MPG, mixed driving. Good amount of highway but also hilly city roads in San Francisco.

m.box.design · 12-17-2012, 01:03 AM

Quote:

Originally Posted by DaJo

Could be the winter blend...

It seems the winter blend of gasoline could very well be the cause of suffering mpg.

Touge_ninja · 12-17-2012, 01:12 AM

I have a guess that mine is caused by the intake since I noticed the drop after install.

ThaBigUnit · 12-17-2012, 02:50 AM

I average about 25-26MPG...about 280 miles per tank...ish

finch1750 · 12-17-2012, 03:14 AM

you are probably running rich. Get a tune or take off the intake. Problem should be solved.

I don't want to sound like a **** but this is for learning experience in the future. If you install something and then all of a sudden something isn't right, undo it and see if it goes back to normal. Reset the the ecu with a battery grain and give it about 50 miles for it to relearn before you get a good answer though. (Did you do this after the intake install? That alone could help)

DaJo · 12-17-2012, 03:27 AM

^

Listen to this gentleman here, he speaks le truth!

Mars2 · 12-17-2012, 03:37 AM

oil contamineted MAF ?
Is the injen oiled filter?

CaptainSlow · 12-17-2012, 07:21 AM

More air is going to require more gas to keep the AF ratios the same. ECU is probably overcompensating for the airflow going out of a standard range...it might eventually learn and lean itself out a bit.

MVJ1975 · 12-17-2012, 07:23 AM

260 or so. I think I average around 24mpg, and I drive it hard.

CaptainSlow · 12-17-2012, 07:42 AM

How hard can you really drive at 24mph, though? :P

12-17-2012, 03:14 AM	#23
finch1750 Undisputed El Presidente Join Date: Jun 2012 Drives: Zenki 37J ZN6 Location: Stockton, CA Posts: 11,594 Thanks: 9,405 Thanked 9,411 Times in 5,270 Posts Mentioned: 374 Post(s)	you are probably running rich. Get a tune or take off the intake. Problem should be solved. I don't want to sound like a **** but this is for learning experience in the future. If you install something and then all of a sudden something isn't right, undo it and see if it goes back to normal. Reset the the ecu with a battery grain and give it about 50 miles for it to relearn before you get a good answer though. (Did you do this after the intake install? That alone could help) __________________ "Just like how a strut bar somehow enables you to corner 20MPH faster around a cloverleaf on-ramp, when the reality is, you can do it already but you just don't have to balls to do it." - CSG David

12-17-2012, 03:27 AM	#24
DaJo FT86Club Vancouver Join Date: Jun 2012 Drives: BRZ Sport-Tech; Drove: MR-S, AE86 Location: Vancouver, BC Posts: 2,533 Thanks: 391 Thanked 1,180 Times in 634 Posts Mentioned: 16 Post(s)	^ Listen to this gentleman here, he speaks le truth! __________________ 1984 AE86 BT 20V 5MT 2007-2012 2000 MR-S 5MT 2010-2012 2013 BRZ Sport-Tech 6AT Since '12 (OEM+ STI tS Build) 2015 Lexus IS250 AWD F-Sport 2 2015-2018 2018 Lexus NX300 F-Sport 3 Since '18

12-17-2012, 07:21 AM	#26
CaptainSlow Senior Member Join Date: Oct 2012 Drives: 2013 Scion FR-S Location: Mid-Michigan Posts: 799 Thanks: 392 Thanked 388 Times in 180 Posts Mentioned: 2 Post(s)	More air is going to require more gas to keep the AF ratios the same. ECU is probably overcompensating for the airflow going out of a standard range...it might eventually learn and lean itself out a bit. __________________ Ultramarine 2013 Scion FR-S 6MT

12-17-2012, 07:42 AM	#28
CaptainSlow Senior Member Join Date: Oct 2012 Drives: 2013 Scion FR-S Location: Mid-Michigan Posts: 799 Thanks: 392 Thanked 388 Times in 180 Posts Mentioned: 2 Post(s)	How hard can you really drive at 24mph, though? :P __________________ Ultramarine 2013 Scion FR-S 6MT

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12-17-2012, 12:52 AM	#16
m.box.design Senior Member Join Date: Apr 2011 Drives: 2013 Whiteout FRS Location: Oregon, USA Posts: 3,081 Thanks: 331 Thanked 1,662 Times in 933 Posts Mentioned: 107 Post(s)	I'm an AT owner and I have to say I've experienced this the last and current tank I'm on. My MPG has dropped to around the 21-22 mpg range, where as I was consistently getting 25-26 before. My driving habits have not changed nor have I made any adjustments/modifications. The only things that have changed is the weather/temperature, but can weather and temperature adversely affect MPG? I also wonder if the quality of the gasoline being brought in is being changed. Last tank was SHELL and current tank is with 76.

12-17-2012, 12:59 AM	#18
Estey Senior Member Join Date: Nov 2012 Drives: Scion FR-S, Ultramarine Location: Socal Posts: 390 Thanks: 48 Thanked 100 Times in 79 Posts Mentioned: 5 Post(s)	if the area you live in has a lot of hills it will worsen your mpg. thats my problem. i probably get around 24 mpg in the city

12-17-2012, 01:02 AM	#19
cdo221 Senior Member Join Date: Nov 2012 Drives: 2013 Ultramarine FR-S, 2015 RS 1.0 Location: SF Bay Area Posts: 532 Thanks: 285 Thanked 174 Times in 110 Posts Mentioned: 13 Post(s)	I get anywhere from 25-28 MPG, mixed driving. Good amount of highway but also hilly city roads in San Francisco.

12-17-2012, 01:12 AM	#21
Touge_ninja Sending rods to their doo Join Date: Jul 2012 Drives: 700HP STi Location: Seattle WA Posts: 1,926 Thanks: 169 Thanked 541 Times in 369 Posts Mentioned: 49 Post(s)	I have a guess that mine is caused by the intake since I noticed the drop after install.

12-17-2012, 02:50 AM	#22
ThaBigUnit Awesome Member! Join Date: May 2012 Drives: 2013 Scion FR-S (Asphalt) Location: Orange County, Ca Posts: 219 Thanks: 44 Thanked 138 Times in 56 Posts Mentioned: 2 Post(s)	I average about 25-26MPG...about 280 miles per tank...ish

12-17-2012, 03:37 AM	#25
Mars2 Senior Member Join Date: Sep 2012 Drives: GT86, AUDI RS2, VW T5 R32 Vortech Location: France Posts: 275 Thanks: 1 Thanked 72 Times in 53 Posts Mentioned: 1 Post(s)	oil contamineted MAF ? Is the injen oiled filter?

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