2,000-3,500k bogging power brapp noise. - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

MaXimus · 02-13-2014, 01:47 AM

Hey Guys,

Having an issue with my 86 and was hoping someone could chime in on what the issue could be. I first had the issue yesterday where I was in 3rd gear around 2.5k rpm and accelerated part throttle and the car felt like its bogging power wise also sounds weird. Best way to describe is brapp brapp brapp up to 3-3.5k rpm.

The only way I can replicate the issue is either from 1st or 2nd gear setting off as slow as possible and then WOT. Starts around 2.2k rpm and goes through to 3.5k rpm and feels like its bogging not just the usual torque dip.

I took a couple of videos which you find below but its hard to hear it on video. Mod’s wise just a track pipe and other than that stock.

Would really appreciate any feedback, I searched my A** off and could find anyone else with the same sound/issue.

[ame="http://www.youtube.com/watch?v=zGUREmX6iwo"]Bhrapp noise between 2.5 to 3krpm - YouTube[/ame]

Best I could get so far, will get the office professional mic.

[ame="http://www.youtube.com/watch?v=yk39XHs3GAk"]Engine noise - YouTube[/ame]

Best capture at 2:18

Cheers,

Sam

Texaz Boy · 02-13-2014, 02:19 AM

Idk can't really hear what your talking about. How many miles you have on it?

RevoG · 02-13-2014, 03:17 AM

Just had a drive in the car and my best guess would be injector failure.

MaXimus · 02-13-2014, 06:04 AM

Quote:

Originally Posted by Texaz Boy

Idk can't really hear what your talking about. How many miles you have on it?

Video shows 43,*** KM 0.o?

humfrz · 02-13-2014, 11:09 AM

Well, I can't hear or see anything that indicates bogging .....

Have you changed type (brand) of gas lately ... ??

humfrz

MaXimus · 02-13-2014, 11:41 AM

Quote:

Originally Posted by humfrz

Well, I can't hear or see anything that indicates bogging .....

Have you changed type (brand) of gas lately ... ??

humfrz

Filled up the morning it happened. Super 95 fuel.

lickitysplit · 02-13-2014, 11:47 AM

Quote:

Originally Posted by MaXimus

Filled up the morning it happened. Super 95 fuel.

Very possible its bad gas, espeically in a car with 12.5:1 compression. See what happens with your next fill up, and use a different station. As a side note I don't hear anything strange, but its hard to tell in a video

humfrz · 02-13-2014, 11:57 AM

Quote:

Originally Posted by lickitysplit

Very possible its bad gas, espeically in a car with 12.5:1 compression. See what happens with your next fill up, and use a different station. As a side note I don't hear anything strange, but its hard to tell in a video

Yep, I agree ..... could be some funky gas. At least try a different pump, if your choise of stations is limited.

humfrz

FRiSson · 02-14-2014, 03:33 PM

Try a can of quality dry gas (ethyl alcohol). It might not solve the bogging issue, but it is a very cheap way to find out if it may be bad gas.

MaXimus · 02-16-2014, 01:46 AM

[ame="http://www.youtube.com/watch?v=VEcIswXR_Xo"]Engine issue - YouTube[/ame]

Updated video much more noticeable.

I have also filled up this morning different station will super 95 so it wasn't a case of bad gas.

Cheers!

1.18sec you notice the change in noise around 2.5k

Burrcold · 02-16-2014, 02:18 AM

I don't hear anything.

CircuitJerk · 02-16-2014, 05:11 AM

I have a similar thing happening. I don't think it's a fuel quality issue in my case.
I see that something is also happening for you right around 4500-5000 rpm like VTEC kicked in yo...

For me, it developed last spring and I had my plugs changed. It made a difference but it didn't go away entirely. I will add that I had some issues with a previous tune, then switched to another tuner and changed over to E85. It was almost imperceptible but then noticed it had become more pronounced when I switched back to pumpgas for the winter, and ultimately storage.
My car is garaged for the winter, but I do plan on revisiting this once spring hits.
Subscribed...

MaXimus · 02-16-2014, 10:02 AM

[ame="http://www.youtube.com/watch?v=14nJT9a6K4k"]2.5 - 3.5k weird sound - YouTube[/ame]

I request you put headphones on and listen, please tell me someone can actually hear it this time..

Not on the first rev, the second one after the air dump from the truck that passed me.

Cheers!

CoupedUpSubie · 02-16-2014, 11:08 AM

How long have you had the track pipe on your car? The AVCS on these cars kicks in somewhere between 3500 to 4000 rpms also.

02-13-2014, 01:47 AM	#1
MaXimus Meh! Join Date: Jul 2012 Drives: Satin White, 86, Manual Location: Dubai Posts: 98 Thanks: 224 Thanked 18 Times in 12 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	2,000-3,500k bogging power brapp noise. Hey Guys, Having an issue with my 86 and was hoping someone could chime in on what the issue could be. I first had the issue yesterday where I was in 3rd gear around 2.5k rpm and accelerated part throttle and the car felt like its bogging power wise also sounds weird. Best way to describe is brapp brapp brapp up to 3-3.5k rpm. The only way I can replicate the issue is either from 1st or 2nd gear setting off as slow as possible and then WOT. Starts around 2.2k rpm and goes through to 3.5k rpm and feels like its bogging not just the usual torque dip. I took a couple of videos which you find below but its hard to hear it on video. Mod’s wise just a track pipe and other than that stock. Would really appreciate any feedback, I searched my A** off and could find anyone else with the same sound/issue. [ame="http://www.youtube.com/watch?v=zGUREmX6iwo"]Bhrapp noise between 2.5 to 3krpm - YouTube[/ame] Best I could get so far, will get the office professional mic. [ame="http://www.youtube.com/watch?v=yk39XHs3GAk"]Engine noise - YouTube[/ame] Best capture at 2:18 Cheers, Sam

02-13-2014, 03:17 AM	#3
RevoG Senior Member Join Date: Dec 2012 Drives: Hot Lava 86 MT Location: Dubai Posts: 168 Thanks: 32 Thanked 56 Times in 36 Posts Mentioned: 9 Post(s) Tagged: 0 Thread(s)	Just had a drive in the car and my best guess would be injector failure. __________________ JR Supercharger, JR RS Pulley, JR Oil cooler, JDL UEL header, Dual resonated 3" JDL Overpipe Front pipe, Perrin 3" resonated cat back exhaust, Upgraded Koyorad radiator, ECUTek tune, Enkei RS05RR 18x9.5, Bridgestone RE003 265/35/18, KW V3 Coilovers, Valenti sequential taillights, Kartboy short shifter kit

02-16-2014, 01:46 AM	#10
MaXimus Meh! Join Date: Jul 2012 Drives: Satin White, 86, Manual Location: Dubai Posts: 98 Thanks: 224 Thanked 18 Times in 12 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	[ame="http://www.youtube.com/watch?v=VEcIswXR_Xo"]Engine issue - YouTube[/ame] Updated video much more noticeable. I have also filled up this morning different station will super 95 so it wasn't a case of bad gas. Cheers! 1.18sec you notice the change in noise around 2.5k __________________ RAYS TE37V 17X9 / MICHELIN 245/40/R17 / KW V3 / RACESENG TOP HATS / MOTUL 5.1 + BRAIDED LINES / FERODO DS2500 BRAKE PADS / NEXUS 7 IN DASH / VDS UEL HEADERS / CRAWFORD POWER BLOCKS/ K&N DROP IN FILTER / Custom 3 inch header back catless exhaust / Varex 3in Muffler / HT AUTO LIP KIT / VALENTI TAIL LIGHTS / MORIMOTO PROJECTOR + HID.

02-16-2014, 02:18 AM	#11
Burrcold Senior Member Join Date: Jul 2010 Drives: Subaru BRZ Limited Location: Toronto, Canada Posts: 2,624 Thanks: 763 Thanked 1,586 Times in 776 Posts Mentioned: 10 Post(s) Tagged: 0 Thread(s)	I don't hear anything. __________________

02-16-2014, 10:02 AM	#13
MaXimus Meh! Join Date: Jul 2012 Drives: Satin White, 86, Manual Location: Dubai Posts: 98 Thanks: 224 Thanked 18 Times in 12 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	[ame="http://www.youtube.com/watch?v=14nJT9a6K4k"]2.5 - 3.5k weird sound - YouTube[/ame] I request you put headphones on and listen, please tell me someone can actually hear it this time.. Not on the first rev, the second one after the air dump from the truck that passed me. Cheers! __________________ RAYS TE37V 17X9 / MICHELIN 245/40/R17 / KW V3 / RACESENG TOP HATS / MOTUL 5.1 + BRAIDED LINES / FERODO DS2500 BRAKE PADS / NEXUS 7 IN DASH / VDS UEL HEADERS / CRAWFORD POWER BLOCKS/ K&N DROP IN FILTER / Custom 3 inch header back catless exhaust / Varex 3in Muffler / HT AUTO LIP KIT / VALENTI TAIL LIGHTS / MORIMOTO PROJECTOR + HID.

02-13-2014, 11:09 AM	#5
humfrz Senior Member Join Date: May 2013 Drives: 2013 FR-S, white, MT Location: Puyallup, WA Posts: 30,061 Thanks: 29,122 Thanked 32,202 Times in 16,572 Posts Mentioned: 709 Post(s) Tagged: 2 Thread(s)	Well, I can't hear or see anything that indicates bogging ..... Have you changed type (brand) of gas lately ... ?? humfrz

02-14-2014, 03:33 PM	#9
FRiSson Senior Member Join Date: Jun 2012 Drives: FR-S MT Location: New England Posts: 1,081 Thanks: 118 Thanked 483 Times in 241 Posts Mentioned: 2 Post(s) Tagged: 0 Thread(s)	Try a can of quality dry gas (ethyl alcohol). It might not solve the bogging issue, but it is a very cheap way to find out if it may be bad gas.

02-16-2014, 05:11 AM	#12
CircuitJerk Pull my finger... Join Date: Dec 2011 Drives: Silver Scion Slushbox Location: Illinois Posts: 996 Thanks: 476 Thanked 367 Times in 226 Posts Mentioned: 26 Post(s) Tagged: 0 Thread(s)	I have a similar thing happening. I don't think it's a fuel quality issue in my case. I see that something is also happening for you right around 4500-5000 rpm like VTEC kicked in yo... For me, it developed last spring and I had my plugs changed. It made a difference but it didn't go away entirely. I will add that I had some issues with a previous tune, then switched to another tuner and changed over to E85. It was almost imperceptible but then noticed it had become more pronounced when I switched back to pumpgas for the winter, and ultimately storage. My car is garaged for the winter, but I do plan on revisiting this once spring hits. Subscribed...

02-16-2014, 11:08 AM	#14
CoupedUpSubie Senior Member Join Date: Nov 2013 Drives: 2013 BRZ Limited Location: United States Posts: 299 Thanks: 11 Thanked 118 Times in 91 Posts Mentioned: 5 Post(s) Tagged: 0 Thread(s)	How long have you had the track pipe on your car? The AVCS on these cars kicks in somewhere between 3500 to 4000 rpms also. __________________ 2013 BRZ Limited 6MT 2014 Ram 1500 Quad Cab Black Ram - 8 speed with 3.21 gears 1994 Honda VFR750 - Two brothers 4-1 left side exit exhaust 1993 Honda CB750 Nighthawk

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