Loud popping in the intake - Page 2 - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

FRSFirestorm · 01-22-2013, 09:32 AM

Coldest its been since owning the car this morning. About 10*F. Car started fine, immediately into cold idle and after a few seconds of running it backfired through the intake several times, or at least thats what it sounded like. Never touching the throttle. Ran fine after that and on the trip to work.

HRTROB · 04-13-2013, 04:55 PM

I've experienced this also. High load, low rpm pop. It can sometimes be replicated by coasting then stabbing the throttle when in 2nd or 3rd at 2,000rpm and below.

CTB727 · 04-13-2013, 07:44 PM

I've had the same problem happen to me only once at ~3,000 miles, during cold start. I'm now close to 5,000. Completely stock too.

romin · 04-14-2013, 12:36 AM

I went to the dealership for an oil change and a routine inspection. While I was there they pointed out that I had this firecracker noise coming from my intake when the throttle was lifted off of idle. I had never heard this sound before but I had cleared a P0315 CEL a couple times.
To me it seemed that the CEL and the misfires were related so I upgraded all four coils and haven't had a problem since.

g0lden · 04-14-2013, 02:50 PM

Only time any of my 20 odd cars backfired through the intake was caused by improper timing.... seems quite odd on a new car.

Coheed · 04-15-2013, 11:13 PM

Injector malfunction? These Direct Injectors having seal issues?

FirestormFRS · 04-15-2013, 11:22 PM

I don't think it's a seal issue. Seems it's a no close issue. Probably not the direct injectors though, most likely (from experiance) it's the port injectors not fully closing.

mad_sb · 04-16-2013, 08:29 AM

Quote:

Originally Posted by Carwhisperer

My injector had a leak from what the dealer found with the PO351 CEL.. the #1 cyl wasn't functioning correctly. That's going to most likely be the issue if you hear the new "intake backfire" issue people are having.

yup, most of the intake backfires i have seen were a result of a leaking port injector. My M3 used to do it on warm starts.... if it sat turned off long enough the fuel system would loose pressure and the leak would stop and the gas that was sitting behind the closed valve would evaporate so it would only do it on warm starts.

Exhaust popping is due to over run fuel lighting off in the exhaust and is nothing to be concerned about. If you want to hear it more, get a high flow 2ndary cat and an axle back or catback exhaust.

LavosTRD · 04-16-2013, 08:50 PM

The Teflon Seals on the Direct Injectors are leaking. Take it to the Dealership and have the tech call Technical Assistance / FTS. Toyota IS aware of the issue.

peachch · 04-21-2013, 08:04 AM

Quote:

Originally Posted by LavosTRD

The Teflon Seals on the Direct Injectors are leaking. Take it to the Dealership and have the tech call Technical Assistance / FTS. Toyota IS aware of the issue.

Which parts should I replace?

LavosTRD · 04-22-2013, 10:23 AM

Take it to your dealer.

romin · 05-03-2013, 11:16 AM

A friend's engine was recently inspected and the dealer found an injector o ring leaking fuel. He said heat could have caused it to melt or it may have been defective.

peachch · 05-03-2013, 01:08 PM

Mine also has the same issue. O-ring of 1st cylinder is completly gone. The picture is 1st and 3rd direct injectors. I just replaced all o-rings and insulators. I did not have chance to drive yet, but popping when cold start has gone.

whtchocla7e · 05-03-2013, 01:37 PM

Guys,
Are your popping sounds similar to mine?

[ame="http://www.youtube.com/watch?v=Ky_vDK4ePHI"]FR-S cold start - YouTube[/ame]

05-03-2013, 01:08 PM	#27
peachch Member Join Date: Jan 2012 Drives: White 86 Sport Plus Location: Thai Posts: 59 Thanks: 24 Thanked 11 Times in 11 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	Mine also has the same issue. O-ring of 1st cylinder is completly gone. The picture is 1st and 3rd direct injectors. I just replaced all o-rings and insulators. I did not have chance to drive yet, but popping when cold start has gone. Attached Images

05-03-2013, 01:37 PM	#28
whtchocla7e Senior Member Join Date: May 2012 Drives: 2013 FR-S Hot Lava Location: CT Posts: 424 Thanks: 30 Thanked 222 Times in 81 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	Guys, Are your popping sounds similar to mine? [ame="http://www.youtube.com/watch?v=Ky_vDK4ePHI"]FR-S cold start - YouTube[/ame] __________________ Live to drive another day

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01-22-2013, 09:32 AM	#15
FRSFirestorm Red is Fastest Join Date: Dec 2012 Drives: 13 FRS 6MT Firestorm Location: Central Kentucky Posts: 439 Thanks: 85 Thanked 242 Times in 120 Posts Mentioned: 11 Post(s) Tagged: 0 Thread(s)	Coldest its been since owning the car this morning. About 10*F. Car started fine, immediately into cold idle and after a few seconds of running it backfired through the intake several times, or at least thats what it sounded like. Never touching the throttle. Ran fine after that and on the trip to work.

04-13-2013, 04:55 PM	#16
HRTROB Senior Member Join Date: Dec 2012 Drives: Toyota 86 Location: Manila, Philippines Posts: 458 Thanks: 144 Thanked 271 Times in 140 Posts Mentioned: 13 Post(s) Tagged: 0 Thread(s)	I've experienced this also. High load, low rpm pop. It can sometimes be replicated by coasting then stabbing the throttle when in 2nd or 3rd at 2,000rpm and below.

04-13-2013, 07:44 PM	#17
CTB727 Senior Member Join Date: Dec 2012 Drives: 2013 Subaru BRZ Location: USA Posts: 237 Thanks: 65 Thanked 104 Times in 59 Posts Mentioned: 3 Post(s) Tagged: 0 Thread(s)	I've had the same problem happen to me only once at ~3,000 miles, during cold start. I'm now close to 5,000. Completely stock too.

04-14-2013, 12:36 AM	#18
romin Member Join Date: Aug 2012 Drives: BRZ, STI, 535, Tiffin Allegro Location: Austin TX Posts: 90 Thanks: 29 Thanked 71 Times in 24 Posts Mentioned: 9 Post(s) Tagged: 0 Thread(s)	I went to the dealership for an oil change and a routine inspection. While I was there they pointed out that I had this firecracker noise coming from my intake when the throttle was lifted off of idle. I had never heard this sound before but I had cleared a P0315 CEL a couple times. To me it seemed that the CEL and the misfires were related so I upgraded all four coils and haven't had a problem since.

04-14-2013, 02:50 PM	#19
g0lden Senior Member Join Date: Dec 2012 Drives: 2013 Scion FR-S Argento Location: Houston, TX Posts: 190 Thanks: 71 Thanked 29 Times in 23 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	Only time any of my 20 odd cars backfired through the intake was caused by improper timing.... seems quite odd on a new car.

04-15-2013, 11:13 PM	#20
Coheed Senior Member Join Date: Jun 2012 Drives: DGM BRZ Limited Location: Seattle Posts: 813 Thanks: 209 Thanked 225 Times in 157 Posts Mentioned: 1 Post(s) Tagged: 0 Thread(s)	Injector malfunction? These Direct Injectors having seal issues?

04-15-2013, 11:22 PM	#21
FirestormFRS Senior Member Join Date: Jul 2012 Drives: 2013 FR-S Location: Anytown Posts: 920 Thanks: 73 Thanked 643 Times in 302 Posts Mentioned: 3 Post(s) Tagged: 0 Thread(s)	I don't think it's a seal issue. Seems it's a no close issue. Probably not the direct injectors though, most likely (from experiance) it's the port injectors not fully closing.

04-16-2013, 08:50 PM	#23
LavosTRD Toyota Master Tech Join Date: Sep 2012 Drives: Whiteout MT Location: San Diego Posts: 108 Thanks: 12 Thanked 50 Times in 24 Posts Mentioned: 6 Post(s) Tagged: 0 Thread(s)	The Teflon Seals on the Direct Injectors are leaking. Take it to the Dealership and have the tech call Technical Assistance / FTS. Toyota IS aware of the issue.

04-22-2013, 10:23 AM	#25
LavosTRD Toyota Master Tech Join Date: Sep 2012 Drives: Whiteout MT Location: San Diego Posts: 108 Thanks: 12 Thanked 50 Times in 24 Posts Mentioned: 6 Post(s) Tagged: 0 Thread(s)	Take it to your dealer.

05-03-2013, 11:16 AM	#26
romin Member Join Date: Aug 2012 Drives: BRZ, STI, 535, Tiffin Allegro Location: Austin TX Posts: 90 Thanks: 29 Thanked 71 Times in 24 Posts Mentioned: 9 Post(s) Tagged: 0 Thread(s)	A friend's engine was recently inspected and the dealer found an injector o ring leaking fuel. He said heat could have caused it to melt or it may have been defective.

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