'14 BRZ Ltd. - Rough Idle - Page 2 - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

BURZ · 05-20-2014, 06:49 PM

So my '14 started having a rough idle a couple of weeks ago (which led me to this post). It bounces between 400-900 rpm at stops, and feels sluggish at times. It did not start doing it until about 4000 mi, and it has been completely random and sporadic since then.. At first I thought it was my AC bogging, or some bad gas, but no.

I called my dealer and they said a rough idle bulletin and new software was just posted for the '14 on 5/14/14, so I have an appointment to get a reflash. It has to do with the learning system of the ECU I believe, and is similar to the problem on the previous model years. You all might want to get a reflash.

steve99 · 05-20-2014, 07:01 PM

Quote:

Originally Posted by leicaboss

Glad to know I'm not the only one then - my car's a 01/2014 produced car (you can see your month by looking at the sticker between the driver's door and the chassis. It's not AS rough as the FR-S problem I had before which was way more sever and felt like the car was gonna stall, but this one is still unsettling nevertheless.

Whats the calid on the ROM should be ZA1JB01C man or ZA1JBO1D auto for USA, if its B00 or A01 dealer should reflash to latest.

extrashaky · 05-20-2014, 09:17 PM

I had forgotten about this thread. I just passed 10,000 miles in mine, and the idle issue seems to have corrected itself over time. I notice it dips occasionally when the AC compressor cycles and every now and then when I turn on the lights, but the general roughness at idle is gone.

I guess my wait and see approach worked out.

Stierzy34 · 05-20-2014, 09:30 PM

I had a similar issue before I sold my BRZ. I frequented this thread often

http://www.ft86club.com/forums/showthread.php?t=15577

ZionsWrath · 05-20-2014, 09:40 PM

Quote:

Originally Posted by Ozzman

Mine always runs better after a good flogging.

haha this, same with the trans. Sometimes I get a bit of a grind going into third but when I'm shifting high RPM its smooth as can be.

As far as idle, the only time it is "rough" is with the AC on the idle fluctuates as the compressor kicks on and off

swpbrz · 05-22-2014, 05:24 PM

I've noticed that too. She gets grumpy if you don't stretch her legs.

DoomsdayJesus · 05-22-2014, 06:40 PM

Quote:

Originally Posted by ZionsWrath

As far as idle, the only time it is "rough" is with the AC on the idle fluctuates as the compressor kicks on and off

There's a re-flash available in a TSB to fix that. It did a whole lot of good for me.

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05-20-2014, 06:49 PM	#15
BURZ Junior Member Join Date: Jan 2014 Drives: 2014 BRZ Limited Location: Kansas City Posts: 6 Thanks: 0 Thanked 1 Time in 1 Post Mentioned: 0 Post(s) Tagged: 0 Thread(s)	So my '14 started having a rough idle a couple of weeks ago (which led me to this post). It bounces between 400-900 rpm at stops, and feels sluggish at times. It did not start doing it until about 4000 mi, and it has been completely random and sporadic since then.. At first I thought it was my AC bogging, or some bad gas, but no. I called my dealer and they said a rough idle bulletin and new software was just posted for the '14 on 5/14/14, so I have an appointment to get a reflash. It has to do with the learning system of the ECU I believe, and is similar to the problem on the previous model years. You all might want to get a reflash.

05-20-2014, 09:17 PM	#17
extrashaky Senior Member Join Date: Mar 2014 Drives: 2014 BRZ Limited Location: USA Posts: 4,045 Thanks: 1,100 Thanked 5,618 Times in 2,266 Posts Mentioned: 55 Post(s) Tagged: 1 Thread(s)	I had forgotten about this thread. I just passed 10,000 miles in mine, and the idle issue seems to have corrected itself over time. I notice it dips occasionally when the AC compressor cycles and every now and then when I turn on the lights, but the general roughness at idle is gone. I guess my wait and see approach worked out.

05-20-2014, 09:30 PM	#18
Stierzy34 :unamused: Join Date: Jun 2013 Drives: 2005 WRB STi "Edna" Location: Belleville, IL Posts: 227 Thanks: 144 Thanked 88 Times in 61 Posts Mentioned: 1 Post(s) Tagged: 0 Thread(s)	I had a similar issue before I sold my BRZ. I frequented this thread often http://www.ft86club.com/forums/showthread.php?t=15577

05-22-2014, 05:24 PM	#20
swpbrz Senior Member Join Date: Mar 2014 Drives: swp brz limited Location: ca Posts: 205 Thanks: 30 Thanked 81 Times in 46 Posts Mentioned: 1 Post(s) Tagged: 0 Thread(s)	I've noticed that too. She gets grumpy if you don't stretch her legs.

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