Rev bounce 2013 Brz - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

ArchReactor86 · 06-15-2019, 11:27 AM

I wanted to know if this was normal? It idle drops below 400 then stutters a little and bounces back up. Here’s a video:

Trueweltall · 06-15-2019, 12:01 PM

Is it just me for did the RPM never drop below 500? Looks like your A/C is on which would mean this is normal.

DarkPira7e · 06-15-2019, 12:06 PM

If you have tuning software, bump the idle up over 800, it won't happen again

humfrz · 06-15-2019, 01:56 PM

If you have recently disconnected the battery, the ECU may still be relearning - not to worry.

If your car has a AT, I understand that there is a patch/update the dealer can do to settle the idle down.

Like said, if your AC compressor is clicking ON, it will drag the idle down.

humfrz

BigTuna · 06-17-2019, 09:12 AM

As mentioned, it's the A/C clutch engaging. Turn the A/C off and see if it still does it.

radroach · 06-19-2019, 06:33 PM

Also be aware if you run your front defroster it also cycles the A/C.

Mine also dips if I raise both windows at once.

06-15-2019, 11:27 AM	#1
ArchReactor86 Member Join Date: Jan 2019 Drives: 2013 GBS BRZ Limited Location: Beaverton OR Posts: 21 Thanks: 9 Thanked 1 Time in 1 Post Mentioned: 0 Post(s) Tagged: 0 Thread(s)	Rev bounce 2013 Brz I wanted to know if this was normal? It idle drops below 400 then stutters a little and bounces back up. Here’s a video:

06-17-2019, 09:12 AM	#5
BigTuna Senior Member Join Date: Jun 2015 Drives: 2013 WRB BRZ Location: Ohio Posts: 672 Thanks: 258 Thanked 477 Times in 275 Posts Mentioned: 4 Post(s) Tagged: 0 Thread(s)	As mentioned, it's the A/C clutch engaging. Turn the A/C off and see if it still does it. __________________ 2013 WRB "Build" Thread

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06-15-2019, 12:01 PM	#2
Trueweltall Senior Member Join Date: Feb 2016 Drives: 2016 Subaru BRZ Location: Florida Posts: 394 Thanks: 91 Thanked 195 Times in 115 Posts Mentioned: 4 Post(s) Tagged: 0 Thread(s)	Is it just me for did the RPM never drop below 500? Looks like your A/C is on which would mean this is normal.

06-15-2019, 12:06 PM	#3
DarkPira7e Rust bucket enthusiast Join Date: Feb 2017 Drives: 2013 Turbo Firestorm FRS Location: Vermont Posts: 3,902 Thanks: 3,178 Thanked 4,069 Times in 2,031 Posts Mentioned: 31 Post(s) Tagged: 0 Thread(s)	If you have tuning software, bump the idle up over 800, it won't happen again

06-15-2019, 01:56 PM	#4
humfrz Senior Member Join Date: May 2013 Drives: 2013 FR-S, white, MT Location: Puyallup, WA Posts: 29,801 Thanks: 28,659 Thanked 31,671 Times in 16,372 Posts Mentioned: 707 Post(s) Tagged: 2 Thread(s)	If you have recently disconnected the battery, the ECU may still be relearning - not to worry. If your car has a AT, I understand that there is a patch/update the dealer can do to settle the idle down. Like said, if your AC compressor is clicking ON, it will drag the idle down. humfrz

06-19-2019, 06:33 PM	#6
radroach Senior Member Join Date: Feb 2013 Drives: car Location: usa Posts: 2,162 Thanks: 1,028 Thanked 867 Times in 530 Posts Mentioned: 35 Post(s) Tagged: 1 Thread(s)	Also be aware if you run your front defroster it also cycles the A/C. Mine also dips if I raise both windows at once.

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