"Dice-in-a-cup" rattle help... - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

PetrolioBenzina · 08-15-2021, 07:01 PM

If I'm driving at a steady speed, in any gear, and give the gas pedal a stab I get a dice-in-a-cup rattle. It does not rattle with a gentle roll-on of the throttle. Seems to be coming from under the car, not engine knock.

Any ideas?

Thanks!

humfrz · 08-15-2021, 08:27 PM

Maybe throttle body chatter?

Something on the floor under the seats rolling around?

Someone put a rock in your cars tailpipe?

A VC put a hand grenade the pin pulled a rubber band holding the handle down, in your gas tank?

(it must be my nap time -

)

PetrolioBenzina · 08-15-2021, 08:34 PM

Quote:

Originally Posted by humfrz

Maybe throttle body chatter?

Something on the floor under the seats rolling around?

Someone put a rock in your cars tailpipe?

A VC put a hand grenade the pin pulled a rubber band holding the handle down, in your gas tank?

(it must be my nap time -

)

Grenade would have detonated by now, but one small enough to fit in the pipe would rattle around. I'll check under the seats.

soundman98 · 08-16-2021, 02:29 PM

What mods do you have?

FR-S2GT86 · 08-16-2021, 02:45 PM

When I first got my FR-S, one of the first things I did was install puddle lights in each door. While I had the door panels off, I found coins in my driver's side door that would roll back and forth as I accellerated and braked. Removed them and the noises disappeared along with.

LimitedSlip · 08-16-2021, 03:06 PM

When you "stab the pedal" perhaps it is causing the engine/exhaust system to "torque twist" just enough for something to momentarily come into contact with the chassis or a heat shield?

PetrolioBenzina · 08-16-2021, 03:38 PM

Quote:

Originally Posted by LimitedSlip

When you "stab the pedal" perhaps it is causing the engine/exhaust system to "torque twist" just enough for something to momentarily come into contact with the chassis or a heat shield?

Thanks. Others have had heat-shield rattles, hoping that's it, or something else not serious.

xtyson · 08-31-2021, 06:32 PM

Hey OP, did you end up figuring out what it was? My car has the exact same rattle. 2018 86.

Sent from my iPhone using Tapatalk

PetrolioBenzina · 09-01-2021, 05:18 AM

Quote:

Originally Posted by xtyson

Hey OP, did you end up figuring out what it was? My car has the exact same rattle. 2018 86.
Sent from my iPhone using Tapatalk

Still no luck, going to poke around underneath this weekend.

trippinbillies40 · 09-01-2021, 01:56 PM

Sounds like it could possibly be a DI seal.

StraightOuttaCanadaEh · 09-01-2021, 02:01 PM

For me it was the front pipe bolt that rattled itself loose gradually. It sounded pretty embarrassing before I finally had it tightened. Could be that. Doesn't exactly match what you're experiencing but apparently this bolt is known for loosening. The sound was coming from directly under the trans tunnel/bulkhead basically

Turdinator · 09-07-2021, 12:37 AM

If the car is manual and you're doing it under 3k rpm it could well be knock

PetrolioBenzina · 09-08-2021, 12:04 PM

Quote:

Originally Posted by Turdinator

If the car is manual and you're doing it under 3k rpm it could well be knock

Thanks, taking out the OFT and checking this weekend, at least thats the plan. I just found out I have a broken bone in my foot.

Turdinator · 09-09-2021, 03:03 AM

Quote:

Originally Posted by PetrolioBenzina

Thanks, taking out the OFT and checking this weekend, at least thats the plan. I just found out I have a broken bone in my foot.

Dude! How hard were you stabbing that gas pedal?!?

08-15-2021, 07:01 PM	#1
PetrolioBenzina Senior Member Join Date: Sep 2016 Drives: 17 86 Location: Oregon Posts: 1,671 Thanks: 75 Thanked 1,133 Times in 647 Posts Mentioned: 10 Post(s) Tagged: 0 Thread(s)	"Dice-in-a-cup" rattle help... If I'm driving at a steady speed, in any gear, and give the gas pedal a stab I get a dice-in-a-cup rattle. It does not rattle with a gentle roll-on of the throttle. Seems to be coming from under the car, not engine knock. Any ideas? Thanks!

08-16-2021, 02:29 PM	#4
soundman98 ProCrastinationConsultant Join Date: Sep 2013 Drives: '14 Ranger, '18 Tacoma 4Dr LB Location: chicago-ish Posts: 11,330 Thanks: 35,240 Thanked 13,673 Times in 6,781 Posts Mentioned: 98 Post(s) Tagged: 0 Thread(s)	What mods do you have? __________________ "The time you enjoy wasting is not wasted time"

09-01-2021, 02:01 PM	#11
StraightOuttaCanadaEh Wes Join Date: Feb 2017 Drives: Artisan Spirits '17 86 Location: Toronto Posts: 2,794 Thanks: 1,165 Thanked 1,674 Times in 994 Posts Mentioned: 21 Post(s) Tagged: 0 Thread(s)	For me it was the front pipe bolt that rattled itself loose gradually. It sounded pretty embarrassing before I finally had it tightened. Could be that. Doesn't exactly match what you're experiencing but apparently this bolt is known for loosening. The sound was coming from directly under the trans tunnel/bulkhead basically __________________ Instagram: @gt86ws

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08-15-2021, 08:27 PM	#2
humfrz Senior Member Join Date: May 2013 Drives: 2013 FR-S, white, MT Location: Puyallup, WA Posts: 29,866 Thanks: 28,787 Thanked 31,813 Times in 16,424 Posts Mentioned: 708 Post(s) Tagged: 2 Thread(s)	Maybe throttle body chatter? Something on the floor under the seats rolling around? Someone put a rock in your cars tailpipe? A VC put a hand grenade the pin pulled a rubber band holding the handle down, in your gas tank? (it must be my nap time - )

08-16-2021, 03:06 PM	#6
LimitedSlip Senior Citizen Member Join Date: Jul 2018 Drives: Then-1977 Celica GT Now-2017 860SE Location: In A Galaxy Far Far Away Posts: 393 Thanks: 145 Thanked 385 Times in 201 Posts Mentioned: 12 Post(s) Tagged: 1 Thread(s)	When you "stab the pedal" perhaps it is causing the engine/exhaust system to "torque twist" just enough for something to momentarily come into contact with the chassis or a heat shield?

08-31-2021, 06:32 PM	#8
xtyson Junior Member Join Date: Apr 2021 Drives: 2018 Toyota 86, Ablaze Red Location: ON Posts: 4 Thanks: 0 Thanked 3 Times in 3 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	Hey OP, did you end up figuring out what it was? My car has the exact same rattle. 2018 86. Sent from my iPhone using Tapatalk

09-01-2021, 01:56 PM	#10
trippinbillies40 Senior Member Join Date: Mar 2013 Drives: '22 WRB Location: US Posts: 854 Thanks: 201 Thanked 1,213 Times in 400 Posts Mentioned: 37 Post(s) Tagged: 0 Thread(s)	Sounds like it could possibly be a DI seal.

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