Help identifying this engine sound (injectors?) - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

DJLtoronto · 04-19-2014, 02:09 AM

After installing an Innovate Motorsports supercharger on a friends BRZ, noticed this sound - consistently happening? It turns on like a switch once the car warms up and gets to it's stable low idle.

You can hear it specifically start at exactly 1m 27s in this video I took today.
[ame="https://www.youtube.com/watch?v=KeNAoty-5Pk&t=1m20s&hd=1"]BRZ sound (D4-S injection system ?) sound changes at 1m 27s - YouTube[/ame]

My first guess is it's related to D4-S injection system - but I couldn't find anything specific here --> http://www.treadstoneperformance.com...brz-explained/ that would explain the sudden switch making the sound we are hearing.

Regardless, can anyone else confirm this is "Normal" for this car. We are probably just being over sensitive to everything as we just installed the SC and a little anxious/curious.

Thanks in advance

Video
[ame="https://www.youtube.com/watch?v=KeNAoty-5Pk&hd=1"]BRZ sound (D4-S injection system ?) sound changes at 1m 27s - YouTube[/ame]

Alltezza · 04-19-2014, 05:24 AM

Yeah, that's normal lol I think every boxer engine sounds like that actually.

And I'm saying it's normal because a friend of mine drives an FRS and I also have BRZ and they all make that same sound.

[ame="https://www.youtube.com/watch?v=3lzXgGo9wNU"]2013 Subaru BRZ Limited In Depth Tour, Engine Sound, Exterior and Interior - YouTube[/ame]

Go to 2:35 you can hear that same sound lol you're fine.

IAmNotTheDriftKing · 04-19-2014, 06:14 AM

Yup, this is a normal sound. I am also very anxious over every noise this engine makes. It gets to me sometimes :/

Rayme · 04-19-2014, 09:50 AM

Use a stethoscope to pin point it.

whitefrs · 04-19-2014, 11:30 AM

Direct Injecion

DJLtoronto · 04-19-2014, 12:54 PM

Thanks everyone for the responses.
Much appreciated.

Bg8780 · 04-20-2014, 04:03 AM

Yep. Mine does it too. Normal.

I thought maybe some sort of solenoid retarding the DI system at low RPM (idle). But I don't know wtf I am talking about.

Sportsguy83 · 04-20-2014, 10:44 AM

I am pretty sure that is the moment the DI pump starts pumping fuel. From a cold start the car starts off on the ports.

Might be wrong but at the very least it is DI related.

Normal, no worries.

04-19-2014, 02:09 AM	#1
DJLtoronto Junior Member Join Date: May 2013 Drives: Mazda Location: Toronto Posts: 8 Thanks: 0 Thanked 5 Times in 3 Posts Mentioned: 2 Post(s) Tagged: 0 Thread(s)	Help identifying this engine sound (injectors?) After installing an Innovate Motorsports supercharger on a friends BRZ, noticed this sound - consistently happening? It turns on like a switch once the car warms up and gets to it's stable low idle. You can hear it specifically start at exactly 1m 27s in this video I took today. [ame="https://www.youtube.com/watch?v=KeNAoty-5Pk&t=1m20s&hd=1"]BRZ sound (D4-S injection system ?) sound changes at 1m 27s - YouTube[/ame] My first guess is it's related to D4-S injection system - but I couldn't find anything specific here --> http://www.treadstoneperformance.com...brz-explained/ that would explain the sudden switch making the sound we are hearing. Regardless, can anyone else confirm this is "Normal" for this car. We are probably just being over sensitive to everything as we just installed the SC and a little anxious/curious. Thanks in advance Video [ame="https://www.youtube.com/watch?v=KeNAoty-5Pk&hd=1"]BRZ sound (D4-S injection system ?) sound changes at 1m 27s - YouTube[/ame] Last edited by DJLtoronto; 04-19-2014 at 02:11 AM. Reason: formatting for easy reading

04-19-2014, 09:50 AM	#4
Rayme The Answer Join Date: Sep 2012 Drives: Mazda 2 Location: Moncton, NB Posts: 1,233 Thanks: 488 Thanked 661 Times in 315 Posts Mentioned: 6 Post(s) Tagged: 0 Thread(s)	Use a stethoscope to pin point it. __________________ \| Roof wrap thread

04-19-2014, 11:30 AM	#5
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)	Direct Injecion __________________ ༼ つ ◕_◕ ༽つ I LOVE BOOST ༼ つ ◕_◕ ༽つ

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04-19-2014, 05:24 AM	#2
Alltezza Senior Member Join Date: Mar 2014 Drives: WRB Limited BRZ Location: Tennessee Posts: 696 Thanks: 450 Thanked 276 Times in 177 Posts Mentioned: 4 Post(s) Tagged: 0 Thread(s)	Yeah, that's normal lol I think every boxer engine sounds like that actually. And I'm saying it's normal because a friend of mine drives an FRS and I also have BRZ and they all make that same sound. [ame="https://www.youtube.com/watch?v=3lzXgGo9wNU"]2013 Subaru BRZ Limited In Depth Tour, Engine Sound, Exterior and Interior - YouTube[/ame] Go to 2:35 you can hear that same sound lol you're fine.

04-19-2014, 06:14 AM	#3
IAmNotTheDriftKing Senior Member Join Date: Feb 2013 Drives: I own an FR-S. . . whatelse! Location: Northwest Indiana Posts: 318 Thanks: 114 Thanked 140 Times in 84 Posts Mentioned: 1 Post(s) Tagged: 0 Thread(s)	Yup, this is a normal sound. I am also very anxious over every noise this engine makes. It gets to me sometimes :/

04-19-2014, 12:54 PM	#6
DJLtoronto Junior Member Join Date: May 2013 Drives: Mazda Location: Toronto Posts: 8 Thanks: 0 Thanked 5 Times in 3 Posts Mentioned: 2 Post(s) Tagged: 0 Thread(s)	Thanks everyone for the responses. Much appreciated.

04-20-2014, 04:03 AM	#7
Bg8780 Senior Member Join Date: Jun 2012 Drives: '13 Black Subaru BRZ Limited Location: All over Posts: 479 Thanks: 439 Thanked 156 Times in 96 Posts Mentioned: 6 Post(s) Tagged: 0 Thread(s)	Yep. Mine does it too. Normal. I thought maybe some sort of solenoid retarding the DI system at low RPM (idle). But I don't know wtf I am talking about.

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