Fuel trims are f***** up - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

tskaohu · 02-18-2016, 06:06 PM

Hey guys,

i have been working on scaling my MAF due to the injen intake that i have installed. as ive been logging ive noticed stft's and ltft's as high as -19% during highway driving and higher than -20% on just basic idle. I have no clue as to why this is happening. I used @vgi utility to scale and loaded up that scale yet my trims are still fucked. Any advice? what the fuck should i do lmao.

Wayno · 02-18-2016, 06:39 PM

1. Take intake off and throw in bin.
2. Don't mistake me as joking.

If you've used one tool a total of one time, you've probably gone backwards btw.

tskaohu · 02-18-2016, 06:40 PM

Quote:

Originally Posted by Wayno

1. Take intake off and throw in bin.
2. Don't mistake me as joking.

If you've used one tool a total of one time, you've probably gone backwards btw.

Everyone has told me that😂. I will definitely. Do that. Metal tubing=horrible heat soak?

86Tony · 02-18-2016, 07:48 PM

just sell the intake and get a drop in which has been proven to make gains. now a days oem intake are so well designed that puttin a intake on some platforms have lost power

swarb · 02-18-2016, 09:05 PM

Quote:

Originally Posted by tskaohu

Everyone has told me that��. I will definitely. Do that. Metal tubing=horrible heat soak?

Yes heat soak. Yes horrible. First run and last run will run so different it will throw all your readings/adjustments off. There was another brand that sold a black metal version of the intake tube and no one speaks of them anymore.

What fuel are you running? e85? any e10/gas in it? From my experience full e85 is on the + side for LTFT, this is for the stage 2 uel e85 oft tune.

Ashikabi · 02-19-2016, 09:28 AM

I heard an intake mid doesn't require maf scaling on this platform. I dunno, just passing that on

wparsons · 02-19-2016, 09:44 AM

^^ That totally depends on which intake. Most intakes on this platform absolutely require MAF scaling to be redone.

For the OP... how many logs do you have, and roughly how many minutes (or hours) of driving do they cover? Under what kinds of conditions? You need a solid hour+ of logs to properly redo the MAF scale under various conditions. You'll need some WOT pulls from low RPM to redline, light throttle across a wide RPM range, etc.

Ashikabi · 02-19-2016, 10:39 AM

Quote:

Originally Posted by wparsons

^^ That totally depends on which intake. Most intakes on this platform absolutely require MAF scaling to be redone.

For the OP... how many logs do you have, and roughly how many minutes (or hours) of driving do they cover? Under what kinds of conditions? You need a solid hour+ of logs to properly redo the MAF scale under various conditions. You'll need some WOT pulls from low RPM to redline, light throttle across a wide RPM range, etc.

Good to know. Thanks for correcting me. I saw you used arrows instead of quote. Do you know how to use the quote function? I didn't for a long time. Just trying to be helpful

phrosty · 02-19-2016, 05:10 PM

Unless your MAF table is realllly off (which is possible, don't know how that intake works), -20% is something I'd expect to see if you're running an E85 tune but 93 gas.

Lonewolf · 02-19-2016, 09:36 PM

Quote:

Originally Posted by tskaohu

Hey guys,

i have been working on scaling my MAF due to the injen intake that i have installed. as ive been logging ive noticed stft's and ltft's as high as -19% during highway driving and higher than -20% on just basic idle. I have no clue as to why this is happening. I used @vgi utility to scale and loaded up that scale yet my trims are still fucked. Any advice? what the fuck should i do lmao.

Yup, get a drop-in filter instead and get tuned by Bill at Delicious...things should be much better by then

tskaohu · 02-19-2016, 10:06 PM

That is my plan. I'm taking my intake out and putting stock back. The. Going delicious ahah

MGPAX · 02-23-2016, 10:53 PM

Is your Adv. multiplier staying up at 1?
I only ask because I recently put 87 in my tank because they mis-labeled it and my trims and adv went crazy. Had to revert to a petrol tune.

Quote:

Originally Posted by tskaohu

Hey guys,

i have been working on scaling my MAF due to the injen intake that i have installed. as ive been logging ive noticed stft's and ltft's as high as -19% during highway driving and higher than -20% on just basic idle. I have no clue as to why this is happening. I used @vgi utility to scale and loaded up that scale yet my trims are still fucked. Any advice? what the fuck should i do lmao.

02-18-2016, 06:39 PM	#2
Wayno Senior Member Join Date: Apr 2014 Drives: Toyota 86 GTS Location: Australia Posts: 1,129 Thanks: 453 Thanked 896 Times in 424 Posts Mentioned: 211 Post(s) Tagged: 0 Thread(s)	1. Take intake off and throw in bin. 2. Don't mistake me as joking. If you've used one tool a total of one time, you've probably gone backwards btw. __________________ rom downloads, information and examples Toyota 86 GTS OFT - Guide To Dialling In OTS Base Tune OFT - Example Alternate Maps for AT, 98RON, E85, MAF Scales

02-19-2016, 05:10 PM	#9
phrosty Senior Member Join Date: Apr 2013 Drives: 2013 FR-S Location: Seattle Posts: 806 Thanks: 202 Thanked 321 Times in 199 Posts Mentioned: 18 Post(s) Tagged: 1 Thread(s)	Unless your MAF table is realllly off (which is possible, don't know how that intake works), -20% is something I'd expect to see if you're running an E85 tune but 93 gas. __________________ 2013 Whiteout 6AT FR-S \| Perrin Inlet Tube + 2.75" CAI \| OpenFlash Header \| P&L Catback \| 4.88 Final Drive \| Dialed in OFT 2.0x Stage 2 E85 \| 18x8 Enkei Raijin + 225/40 Michelin Pilot Super Sport \| 17x7 Stock + 215/45 Michelin X-Ice Xi-2

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02-18-2016, 07:48 PM	#4
86Tony Senior Member Join Date: Dec 2013 Drives: 2015 AOZORA EDITION Location: Markham, ON Posts: 477 Thanks: 63 Thanked 122 Times in 81 Posts Mentioned: 4 Post(s) Tagged: 1 Thread(s)	just sell the intake and get a drop in which has been proven to make gains. now a days oem intake are so well designed that puttin a intake on some platforms have lost power

02-19-2016, 09:28 AM	#6
Ashikabi Senior Member Join Date: Aug 2014 Drives: 2013 FR-S Location: Northwest Iowa Posts: 7,359 Thanks: 454 Thanked 4,549 Times in 2,950 Posts Mentioned: 59 Post(s) Tagged: 5 Thread(s)	I heard an intake mid doesn't require maf scaling on this platform. I dunno, just passing that on

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