Loud misfires upon cold start - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

connorlug · 10-14-2013, 07:56 PM

Hey guys, I'm unfortunately making my first post with an issue.

I have a brand new 10 series FRS, with about 800 miles on it.

I've had no issues except for this, when I start the car cold in the morning, for the first 15 seconds of high idle I get 2 - 3 loud misfires, sometimes more sometimes less. No codes are thrown, and after the car gets through the first 30 seconds of high idle it runs perfectly.

I'm actually a certified toyota tech believe it or not, but before I lay this issue on my master tech I wanted to get some info from the forums. Anyone else have this issue or can point me to the correct thread? Thanks again!

I should also clarify - My car was produced after cutoff date for the Rough idle/camshaft sensor/misfire TSB.

whitefrs · 10-14-2013, 08:07 PM

maybe DI Seals are bad but i doubt it cuz is not even broken in which means u dont go over 4k rpms

what dealer do u work at?

connorlug · 10-14-2013, 08:10 PM

Competition Toyota (suffolk county) it's broken in, it's been above 4k a few times.

feldy · 10-14-2013, 08:24 PM

that's the sounds of the precat warming I thought I have the same thing on cold mornings started over winter.

mike_ekim1024 · 10-14-2013, 09:00 PM

Quote:

Originally Posted by feldy

that's the sounds of the precat warming I thought I have the same thing on cold mornings started over winter.

Is it just sound or can you feel it? I have the same thing now with a alpha-tune. It just happens once or twice early in the warmup.

whitefrs · 10-14-2013, 09:03 PM

Quote:

Originally Posted by connorlug

Competition Toyota (suffolk county) it's broken in, it's been above 4k a few times.

Middle Island?

well post a video of ur car so we can hear the sound

connorlug · 10-14-2013, 09:10 PM

Quote:

Originally Posted by whitefrs

Middle Island?

well post a video of ur car so we can hear the sound

Yup middle island! Whereabouts are you from? And will do, I'll grab a video in the morning after it sits all night

whitefrs · 10-14-2013, 10:33 PM

Quote:

Originally Posted by connorlug

Yup middle island! Whereabouts are you from? And will do, I'll grab a video in the morning after it sits all night

Im from East Quogue

Yea post that Video up

Sent from somewhere

Steve · 10-14-2013, 10:56 PM

Had the same sound almost every morning last winter and some cold mornings in the fall and spring. Some of the pops are quite loud. I think feldy might be right that it has to do with the cats warming up, because the car runs fine and i have never heard that sound at any other time than initial start-up. Many people on the forums have noticed the sound last winter and I'm sure the topic will pop up more this winter, but I don't remember reading about any resolutions or anyone having it looked at by Toyota.

Opposed · 10-14-2013, 11:06 PM

Yep, my car does the same thing but only during the winter when cold starts are below 35 degrees usually. I thought it was my DI seals too, but it has started perfectly all spring, summer, and so far fall. I heard from a tuner that the "pops" are from the pre cats warming up as well.

ft_sjo · 10-15-2013, 03:00 AM

Lean misfires during cat light procedure. Normal, but a bit shitty. I'm going to dial it out on mine.

sweetfrs · 10-21-2013, 02:11 PM

Now are we talking about a sound like champange cork going off under hood? Is tht the pre cats? Cuz i got that today for the first time

Wepeel · 10-21-2013, 02:35 PM

Quote:

Originally Posted by sweetfrs

Now are we talking about a sound like champange cork going off under hood? Is tht the pre cats? Cuz i got that today for the first time

Yeah mine are like that. It's captured pretty well here:
http://www.ft86club.com/forums/showp...58&postcount=3

Although mine doesn't pop that much, but the sound is similar. But usually I start driving earlier and I never get those sounds other than on occasional cold startup.

I don't think it's DI seals since I have an 01C cal and still under 5k miles.

The lean misfire thing makes sense - I just switched from E0 to E10 and the first cold startup on E10 it popped more than it ever has before - probably because fuel trims were dialed back for E0, and as a result E10 was probably running a little lean before the ECU had a chance to learn and adjust fuel trims.

JDMenrique · 10-21-2013, 02:43 PM

Same issues here. Only on really cold mornings, almost sounds like really loud knocks. Car runs just fine when you drive away.

10-14-2013, 07:56 PM	#1
connorlug Member Join Date: Sep 2013 Drives: #1553 10 Series FRS Location: Long Island, NY Posts: 85 Thanks: 11 Thanked 39 Times in 23 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	Loud misfires upon cold start Hey guys, I'm unfortunately making my first post with an issue. I have a brand new 10 series FRS, with about 800 miles on it. I've had no issues except for this, when I start the car cold in the morning, for the first 15 seconds of high idle I get 2 - 3 loud misfires, sometimes more sometimes less. No codes are thrown, and after the car gets through the first 30 seconds of high idle it runs perfectly. I'm actually a certified toyota tech believe it or not, but before I lay this issue on my master tech I wanted to get some info from the forums. Anyone else have this issue or can point me to the correct thread? Thanks again! I should also clarify - My car was produced after cutoff date for the Rough idle/camshaft sensor/misfire TSB.

10-14-2013, 08:07 PM	#2
whitefrs Love Boost!!!!!!!! Join Date: Jun 2012 Drives: Whiteout Scion FR-S Location: Long Island NY Posts: 3,612 Thanks: 429 Thanked 902 Times in 606 Posts Mentioned: 87 Post(s) Tagged: 3 Thread(s)	maybe DI Seals are bad but i doubt it cuz is not even broken in which means u dont go over 4k rpms what dealer do u work at? __________________ ༼ つ ◕_◕ ༽つ I LOVE BOOST ༼ つ ◕_◕ ༽つ

10-14-2013, 08:24 PM	#4
feldy Senior Member Join Date: Aug 2011 Drives: 2013 FRS Asphalt Location: SF Bay Area Posts: 1,155 Thanks: 309 Thanked 335 Times in 212 Posts Mentioned: 21 Post(s) Tagged: 0 Thread(s)	that's the sounds of the precat warming I thought I have the same thing on cold mornings started over winter. __________________ 2013 Scion FR-S AT Picked up 5/30/2012

10-14-2013, 11:06 PM	#10
Opposed Senior Member Join Date: Jun 2012 Drives: 2013 Asphalt FR-S Location: Bloomington, MN Posts: 1,156 Thanks: 499 Thanked 447 Times in 294 Posts Mentioned: 7 Post(s) Tagged: 0 Thread(s)	Yep, my car does the same thing but only during the winter when cold starts are below 35 degrees usually. I thought it was my DI seals too, but it has started perfectly all spring, summer, and so far fall. I heard from a tuner that the "pops" are from the pre cats warming up as well. __________________ Asphalt FR-S: EcuTek Visconti STG2 tune, MAPerformance turbo kit, MAPerformance 3" exhaust, Hotchkis springs, Mach-V 17x9 Awesomes. Build thread: http://www.ft86club.com/forums/showthread.php?t=30703

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Cold start question	retrosmiths	Scion FR-S / Toyota 86 GT86 General Forum	106	11-15-2016 03:14 PM
Cold start up popping noise	Weeber	Issues \| Warranty \| Recalls / TSB	51	09-23-2016 01:54 PM
White Smoke cold start up in Cold Weather (turbo cars)	whitefrs	Forced Induction	17	09-25-2013 06:05 PM
Cold Start Exhaust Volume	SilentMike	Engine, Exhaust, Transmission	15	04-04-2013 11:49 AM
Loud cold start and mpg drop since new	be6sti	Issues \| Warranty \| Recalls / TSB	7	11-28-2012 02:35 PM

10-14-2013, 08:10 PM	#3
connorlug Member Join Date: Sep 2013 Drives: #1553 10 Series FRS Location: Long Island, NY Posts: 85 Thanks: 11 Thanked 39 Times in 23 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	Competition Toyota (suffolk county) it's broken in, it's been above 4k a few times.

10-14-2013, 10:56 PM	#9
Steve Senior Member Join Date: Dec 2011 Drives: 6MT Location: Markham, ON Posts: 311 Thanks: 3 Thanked 101 Times in 63 Posts Mentioned: 16 Post(s) Tagged: 0 Thread(s)	Had the same sound almost every morning last winter and some cold mornings in the fall and spring. Some of the pops are quite loud. I think feldy might be right that it has to do with the cats warming up, because the car runs fine and i have never heard that sound at any other time than initial start-up. Many people on the forums have noticed the sound last winter and I'm sure the topic will pop up more this winter, but I don't remember reading about any resolutions or anyone having it looked at by Toyota.

10-15-2013, 03:00 AM	#11
ft_sjo Banned Join Date: Oct 2012 Drives: GT86 Location: The Motherland Posts: 1,398 Thanks: 140 Thanked 473 Times in 271 Posts Mentioned: 22 Post(s) Tagged: 0 Thread(s)	Lean misfires during cat light procedure. Normal, but a bit shitty. I'm going to dial it out on mine.

10-21-2013, 02:11 PM	#12
sweetfrs Senior Member Join Date: Mar 2013 Drives: 2013 FRS Location: Seattle, WA Posts: 406 Thanks: 110 Thanked 59 Times in 51 Posts Mentioned: 10 Post(s) Tagged: 0 Thread(s)	Now are we talking about a sound like champange cork going off under hood? Is tht the pre cats? Cuz i got that today for the first time

User Name		Remember Me?
Password