Rumble Research

[jasestu]

Hi team,

I'm wanting to collate as much information as I can about this frustrating rumble (link includes sound files). The rumble is heard/felt on many RS200 manuals during the overrun (when you back off the accelerator) and the car revs down through 3000 rpm.

I'm calling on all manual RS200 owners (who still have a 3S-GE in there) to fill out a quick survey for me:

Induction

Flywheel

Gearbox

Exhaust

Year

Rumble yes/no

+ any other information you think might be helpful.

Here's me:

Induction - Factory (tried with 4500rpm flap, that one that selects air from the front vs the wheel arch, open and closed)

Flywheel - Factory (dual mass, not changed since factory)

Gearbox - Factory

Exhaust - Factory

Year - 1999

Rumble - Yes :(

Other Information

Have replaced the factory driveshaft 'cause it had notchy universals. Thought this may be a cause, but it had no effect on the rumble.

[Mr Singh]

Induction - Forced induction

Flywheel - TRD Lightweight

Gearbox - Factory

Exhaust - HKS Silent Hi-Power

Year - 1999

Rumble - No

Also.... have youi checked to see if your propshaft isn't bent or warped?

[Zee007]

Induction - Apexi induction

Flywheel - TRD Lightweight

Gearbox - TRD quick shift

Exhaust - HKS Hiper

Year - 1999

Rumble - Not really sure, never looked into it....

[Monster-Mat]

The rumble is quite common, allegedly its a trait of this engine, ive herd about this before from TTE

[jasestu]

The rumble is quite common, allegedly its a trait of this engine, ive herd about this before from TTE

←

I've heard almost every story of what the rumble 'could' be, but have not been convinced of any real cause, yet. Someone mentioned that 3SGE MR2's sometimes exhibit the noise, but I'm yet to confirm. My current theory (read guess) is that it's caused in the engine and amplified by the driveline. Driveline changes seem to affect the noise/rumble, but not really eliminate it. I want to try and tinker more with the intake and how the ECU manages fuel to see if any of that can affect the rumble (following the caused in the intake/plenium theory).

Thanks for the responces so far, I'll collate and present some results once I've got a few more.

[Zee007]

I want to add to this thread Jason - since you posted this up, I have been monitoring my Tezza, and I too have the "rumble". Definately what you described.

[AltezzaScott]

Induction - HKS Racing Suction kit

Flywheel - TOMS ultra lightweight

Gearbox - Factory

Exhaust - HKS Super Header II and 5Zigen Border fireball

Year - 2000

Rumble - No

[Taz_1]

Induction - Blitz SUS pwr

Flywheel - TOMS lightweight

Gearbox - Factory/TRD q/shift

Exhaust - Blitz Nur Spec

Year - 2002

Rumble - Not quite sure - will have to check.

[jasestu]

Well I'm still rumbling. Here's the results I've collected so far:

I can't spot a trend. Anyone else?

I'm getting a lot of driveline/transmission work done shortly. If that doesn't change anything then I'm buying an Air:Fuel controller and seeing if I can override what might be causing it from that angle...