2017 BRZ Intermittent Idle Dip - Page 2 - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

JesseG · 06-24-2020, 09:52 AM

Just to echo what everyone else is saying, my FRS does the same thing, with the AC on at idle. It almost feels like the engine will die sometimes the RPMs drop so low. I’ve gotten used to it. The twins have a ton of “character” that’s for sure.

Sent from my iPhone using Tapatalk

tomm.brz · 06-24-2020, 09:55 AM

>my17 in europe are the worst
also ots v4 based on euro tune have quite a shitty idle

Schweiz · 06-24-2020, 10:06 AM

Quote:

Originally Posted by WNDSRFR

Yeah
Mine's been doing the idle dip thing since day one. But mine is definitely caused by the AC cycling. If I come to a stop just as the AC turns on the idle will dip every time.

Will the idle continue to dip after you come to a stop? Mine mostly isn't even when I'm coming to a stop, rather when I have been sitting still for a couple seconds.

DarkPira7e · 06-24-2020, 10:07 AM

I raised my idle to 950rpm and the a/c doesn't bother the car anymore. Even a clutch in from 6000rpm letting it sink all the way down, it doesn't stumbled to catch. It hesitates a little when idling, but nothing like the stumble it had when the idle rpm were at 650-700

WNDSRFR · 06-24-2020, 10:08 AM

In 6 years my engine has stalled just once because of this. Stopped at a traffic light, the idle dipped really low and the engine stalled. Started the car right up and had a CEL. Oh shit! My car is broken!
Went home and cleared the code with OFT. I forget what the code was. I think it was something about the vacuum.
Turns out it was just a hiccup and hasn't happened again. (Hasn't stalled, that is, it still dips all the time.)

Schweiz · 06-24-2020, 10:08 AM

Quote:

Originally Posted by tomm.brz

also ots v4 based on euro tune have quite a shitty idle

Sorry for the noob question, but what does this mean?

WNDSRFR · 06-24-2020, 10:11 AM

Quote:

Originally Posted by Schweiz

Will the idle continue to dip after you come to a stop? Mine mostly isn't even when I'm coming to a stop, rather when I have been sitting still for a couple seconds.

Turn off the radio and listen. When the car is idling and you hear a click, that click is the AC compressor turning on. The idle dip always coincides with that click.

Schweiz · 06-24-2020, 10:12 AM

Quote:

Originally Posted by DarkPira7e

I raised my idle to 950rpm and the a/c doesn't bother the car anymore.

Is the idle something that can be set using OFT?

Yoshoobaroo · 06-24-2020, 10:14 AM

Quote:

Originally Posted by DarkPira7e

I raised my idle to 950rpm and the a/c doesn't bother the car anymore. Even a clutch in from 6000rpm letting it sink all the way down, it doesn't stumbled to catch. It hesitates a little when idling, but nothing like the stumble it had when the idle rpm were at 650-700

Yea I raised mine to 850 and it helped a ton.

Schweiz · 06-24-2020, 10:20 AM

Quote:

Originally Posted by WNDSRFR

When the car is idling and you hear a click, that click is the AC compressor turning on. The idle dip always coincides with that click.

Does the A/C compressor run even when the HVAC controls are turned all the way off by some chance? I remember reading somewhere that the compressor runs even when the A/C button is turned off, but I don't know how true that is.

In the video link I posted in the OP, I turned all the HVAC controls off to try an make sure the A/C was not causing the problem, plus I can't the click of the compressor kicking on. (maybe its extremely quiet?)

NoHaveMSG · 06-24-2020, 10:21 AM

Quote:

Originally Posted by tomm.brz

>my17 in europe are the worst
also ots v4 based on euro tune have quite a shitty idle

I agree, I am not a fan of the OTS v4 tunes at all. Mine tune is still based on the early stuff.

600 RPM idle is too low. I bumped mine to 950 as well since coming off the track, or driving the car on a sprited back road oil pressure was extremely low.

WNDSRFR · 06-24-2020, 10:28 AM

Quote:

Originally Posted by Schweiz

Does the A/C compressor run even when the HVAC controls are turned all the way off by some chance? I remember reading somewhere that the compressor runs even when the A/C button is turned off, but I don't know how true that is.

In the video link I posted in the OP, I turned all the HVAC controls off to try an make sure the A/C was not causing the problem, plus I can't the click of the compressor kicking on. (maybe its extremely quiet?)

The compressor also turns on if you are in defrost mode.

DarkPira7e · 06-24-2020, 10:36 AM

Quote:

Originally Posted by Schweiz

Is the idle something that can be set using OFT?

In the tune, definitely

tomm.brz · 06-24-2020, 11:00 AM

i successfully put 760rpm as hot idle in my tunes, but the real very rock steady is at 900rpm

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06-24-2020, 09:52 AM	#15
JesseG Senior Member Join Date: Aug 2019 Drives: 2016 Scion FR-S Location: Dallas Posts: 806 Thanks: 2,685 Thanked 393 Times in 266 Posts Mentioned: 1 Post(s) Tagged: 0 Thread(s)	Just to echo what everyone else is saying, my FRS does the same thing, with the AC on at idle. It almost feels like the engine will die sometimes the RPMs drop so low. I’ve gotten used to it. The twins have a ton of “character” that’s for sure. Sent from my iPhone using Tapatalk

06-24-2020, 09:55 AM	#16
tomm.brz Senior Member Join Date: Jan 2017 Drives: brz 2017 hksv2 Location: italy Posts: 2,196 Thanks: 500 Thanked 1,066 Times in 775 Posts Mentioned: 65 Post(s) Tagged: 0 Thread(s)	>my17 in europe are the worst also ots v4 based on euro tune have quite a shitty idle

06-24-2020, 10:07 AM	#18
DarkPira7e Rust bucket enthusiast Join Date: Feb 2017 Drives: 2013 Turbo Firestorm FRS Location: Vermont Posts: 3,932 Thanks: 3,199 Thanked 4,095 Times in 2,045 Posts Mentioned: 31 Post(s) Tagged: 0 Thread(s)	I raised my idle to 950rpm and the a/c doesn't bother the car anymore. Even a clutch in from 6000rpm letting it sink all the way down, it doesn't stumbled to catch. It hesitates a little when idling, but nothing like the stumble it had when the idle rpm were at 650-700

06-24-2020, 10:08 AM	#19
WNDSRFR Senior Member Join Date: Jan 2014 Drives: FR-S,GTI Location: Cocoa, Florida Posts: 1,155 Thanks: 228 Thanked 823 Times in 419 Posts Mentioned: 13 Post(s) Tagged: 0 Thread(s)	In 6 years my engine has stalled just once because of this. Stopped at a traffic light, the idle dipped really low and the engine stalled. Started the car right up and had a CEL. Oh shit! My car is broken! Went home and cleared the code with OFT. I forget what the code was. I think it was something about the vacuum. Turns out it was just a hiccup and hasn't happened again. (Hasn't stalled, that is, it still dips all the time.)

06-24-2020, 11:00 AM	#28
tomm.brz Senior Member Join Date: Jan 2017 Drives: brz 2017 hksv2 Location: italy Posts: 2,196 Thanks: 500 Thanked 1,066 Times in 775 Posts Mentioned: 65 Post(s) Tagged: 0 Thread(s)	i successfully put 760rpm as hot idle in my tunes, but the real very rock steady is at 900rpm

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