OFT Stage 1, Newb Questions - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

wyatt263 · 09-30-2016, 07:35 PM

Just installed a stage one OFT for 93octane fuel. I may be noticing more engine noise, not intake noise, badddd engine noise. Or maybe I'm just listening to it more carefully since I've installed a tune. Is this tune safe? My LTFT is around - 7%, isn't that a little low? I've got an Injen cold air intake that claims to be tuned and has a little tube bypassing the MAF sensor, could that be messing up my fuel trim? Also, I noticed on the data log on WOT the parameter only reads 97% and there's about 1/8in of dead spot at the beginning of the pedal, is there a fix for that? Already went through ignition cycles to hopefully re-learn it, but to no avail. This is my first time tuning and I have no idea what to look for.

Teseo · 09-30-2016, 07:48 PM

Dead pedal will gone soon, let the ecu learn parameters.
Noise can be valvetrain

NyC Zn6 · 09-30-2016, 08:07 PM

When I first tuned my car with the OFT I also noticed an increase in sound as well. Vtec just kick in yo..

PandaBRZ · 09-30-2016, 08:12 PM

You're hearing the more aggressive valve timing from 3-5k RPM.

guybo · 10-01-2016, 09:36 AM

-7% at idle is nothing to worry about. But check LTFT after a couple hundred miles when ECU has learned the new trims. It sounds like you haven't put that many miles on so what's your total fuel trims (LTFT + STFT) at idle and at 2500 RPM? At stage 1 at idle mine were around -5 or -6, less negative at 2500 RPM

The extra noise I heard at stage 1 seemed to be in the torque valley RPMs. I figured the tune was changing the cam timing to compensate for the torque hole. I'm not sure though, I have no way to verify. But when you tune, sounds change. When you have an intake, you hear the new sounds louder. Don't sweat it.

At stage 2, there's a whole different set of noises to fret over!

D_Thissen · 10-01-2016, 09:51 AM

Quote:

Originally Posted by wyatt263

Just installed a stage one OFT for 93octane fuel. I may be noticing more engine noise, not intake noise, badddd engine noise. Or maybe I'm just listening to it more carefully since I've installed a tune. Is this tune safe? My LTFT is around - 7%, isn't that a little low? I've got an Injen cold air intake that claims to be tuned and has a little tube bypassing the MAF sensor, could that be messing up my fuel trim? Also, I noticed on the data log on WOT the parameter only reads 97% and there's about 1/8in of dead spot at the beginning of the pedal, is there a fix for that? Already went through ignition cycles to hopefully re-learn it, but to no avail. This is my first time tuning and I have no idea what to look for.

Yup, that's normal. I believe it has to do with the drive by wire. The dead spot will go away after a 100km (60miles) or so.

DarkSunrise · 10-01-2016, 10:19 AM

Quote:

Originally Posted by wyatt263

Just installed a stage one OFT for 93octane fuel. I may be noticing more engine noise, not intake noise, badddd engine noise. Or maybe I'm just listening to it more carefully since I've installed a tune. Is this tune safe? My LTFT is around - 7%, isn't that a little low? I've got an Injen cold air intake that claims to be tuned and has a little tube bypassing the MAF sensor, could that be messing up my fuel trim? Also, I noticed on the data log on WOT the parameter only reads 97% and there's about 1/8in of dead spot at the beginning of the pedal, is there a fix for that? Already went through ignition cycles to hopefully re-learn it, but to no avail. This is my first time tuning and I have no idea what to look for.

Use this procedure to get rid of the dead spot after re-tuning. Always works for me.

Quote:

Originally Posted by Foobar

Could try Jeff Perrin's suggestion of turning car on without starting the engine, fully press and release gas pedal 20 times, turn car off, turn on without starting again, press and release 20 times again, then start engine. No more ECU reset dead pedal.

Sent from my Nexus 4 using Tapatalk 2

As for negative fuel trims, try posting a data log after a few hundred miles.

fibble · 10-02-2016, 10:01 PM

Less than 100% throttle at WOT is completely normal for these cars.

You need to read some of the OFT tips and tricks posts. All will become clear

.

Jrider · 11-01-2016, 01:50 PM

I just tuned my car with the OFT to stage 1. I have a perrin CAI, and a perrin catback. I noticed what sounded like a terrible engine noise right around 4000 RPM. It sounded bad like the original poster said. I thought it was related to the intake perhaps. Flashed back to stock and it is gone. So this raspy, almost grinding loud noise is normal??? Will the stock airbox continue to produce this sound if I put it back on?

phrosty · 11-01-2016, 02:35 PM

Quote:

Originally Posted by Jrider

I just tuned my car with the OFT to stage 1. I have a perrin CAI, and a perrin catback. I noticed what sounded like a terrible engine noise right around 4000 RPM. It sounded bad like the original poster said. I thought it was related to the intake perhaps. Flashed back to stock and it is gone. So this raspy, almost grinding loud noise is normal??? Will the stock airbox continue to produce this sound if I put it back on?

It's normal and not related to your intake. It is caused by aggressive VVT tuning to reduce torque dip.

BirdTRD · 11-01-2016, 02:57 PM

slap a header on it and flash stage 2 tune....that noise will go away!

Synkopy · 11-03-2016, 04:36 PM

Noise is still there with stage 2. Can confirm. Just not as loud.

09-30-2016, 07:35 PM	#1
wyatt263 Member Join Date: Feb 2016 Drives: 2013 Scion FRS, 1985 Toyota Supra Location: Central Virginia, USA Posts: 30 Thanks: 8 Thanked 39 Times in 9 Posts Mentioned: 1 Post(s) Tagged: 0 Thread(s)	OFT Stage 1, Newb Questions Just installed a stage one OFT for 93octane fuel. I may be noticing more engine noise, not intake noise, badddd engine noise. Or maybe I'm just listening to it more carefully since I've installed a tune. Is this tune safe? My LTFT is around - 7%, isn't that a little low? I've got an Injen cold air intake that claims to be tuned and has a little tube bypassing the MAF sensor, could that be messing up my fuel trim? Also, I noticed on the data log on WOT the parameter only reads 97% and there's about 1/8in of dead spot at the beginning of the pedal, is there a fix for that? Already went through ignition cycles to hopefully re-learn it, but to no avail. This is my first time tuning and I have no idea what to look for.

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09-30-2016, 07:48 PM	#2
Teseo Senior Member Join Date: Jun 2014 Drives: frs Location: Gunsai Posts: 4,877 Thanks: 7,143 Thanked 2,922 Times in 1,769 Posts Mentioned: 23 Post(s) Tagged: 2 Thread(s)	Dead pedal will gone soon, let the ecu learn parameters. Noise can be valvetrain

09-30-2016, 08:07 PM	#3
NyC Zn6 Senior Member Join Date: Apr 2013 Drives: 10 Series #974 6m/t Location: NYC Posts: 1,956 Thanks: 1,357 Thanked 1,141 Times in 669 Posts Mentioned: 6 Post(s) Tagged: 2 Thread(s)	When I first tuned my car with the OFT I also noticed an increase in sound as well. Vtec just kick in yo..

10-01-2016, 09:36 AM	#5
guybo Huge E85 fan! Join Date: May 2016 Drives: 2016 Scion FRS Location: Tampa, FL, USA Posts: 1,850 Thanks: 539 Thanked 1,010 Times in 605 Posts Mentioned: 32 Post(s) Tagged: 0 Thread(s)	-7% at idle is nothing to worry about. But check LTFT after a couple hundred miles when ECU has learned the new trims. It sounds like you haven't put that many miles on so what's your total fuel trims (LTFT + STFT) at idle and at 2500 RPM? At stage 1 at idle mine were around -5 or -6, less negative at 2500 RPM The extra noise I heard at stage 1 seemed to be in the torque valley RPMs. I figured the tune was changing the cam timing to compensate for the torque hole. I'm not sure though, I have no way to verify. But when you tune, sounds change. When you have an intake, you hear the new sounds louder. Don't sweat it. At stage 2, there's a whole different set of noises to fret over!

10-02-2016, 10:01 PM	#8
fibble Member Join Date: Jan 2016 Drives: 2015 86 GTS Location: Melbourne, Australia Posts: 41 Thanks: 13 Thanked 15 Times in 14 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	Less than 100% throttle at WOT is completely normal for these cars. You need to read some of the OFT tips and tricks posts. All will become clear .

11-01-2016, 01:50 PM	#9
Jrider Member Join Date: Jun 2016 Drives: 2013 Silver BRZ Location: Central Coast, CA Posts: 17 Thanks: 3 Thanked 0 Times in 0 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	I just tuned my car with the OFT to stage 1. I have a perrin CAI, and a perrin catback. I noticed what sounded like a terrible engine noise right around 4000 RPM. It sounded bad like the original poster said. I thought it was related to the intake perhaps. Flashed back to stock and it is gone. So this raspy, almost grinding loud noise is normal??? Will the stock airbox continue to produce this sound if I put it back on?

11-03-2016, 04:36 PM	#12
Synkopy Dragon King of Jupiter Join Date: Mar 2015 Drives: 2016 BRZ Hyperblue Location: London, KY Posts: 41 Thanks: 14 Thanked 21 Times in 13 Posts Mentioned: 1 Post(s) Tagged: 0 Thread(s)	Noise is still there with stage 2. Can confirm. Just not as loud.

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