on a very heacy rainny day
i drove my kizi on mountain road,
when drove on hill, i hard press brake,
my steering tremble heavy (felt like rpm too low)
what is my problem? disc brake ? water ?
i felt twice the experience
a day later, the tremble gone,
i try hard press brake on high speed (110kmph / 65mph) also no more tremble
howeve it tremble only when my kizi come to a stop (rpm low)
i did clean the throttle but only last for few week.
anybody could advice me?
1) what cause the heavy tremble when hard brake on downhill (100kmph/60mph) ?
2) why throttle get dirt so easy
hard press on brake steering tremble ?
You may have warped rotors. Your story sounds very similar to mine when I warped my rotors. I was driving on a mountain and had to repeatedly brake hard. After that, I noticed brake fade (overheated brake pads that don't work as well) and then later, vibrations when braking. These are some characteristics of rotor warping. Basically they get overheated and warp in shape a little bit. This deformation of the shape is the reason why you feel the vibrations when braking, especially light braking.
The best way to resolve it is to get new brake rotors. Rotors don't last forever so you shouldn't see it as component failure but more conditional premature wear. I have since upgraded to slotted rotors and high performance ceramic brake pads. The combo is quiet and low dust, but really bite down much better in hard braking to slow the car faster than the OE rotors and pads. The downside to slotted rotors is that tend to wear out faster than solid rotors and eat through brake pads, but are generally more resistant to issues of brake fade and warping due to their superior stopping performance.
Lastly, if your throttle body is dirty, you may want to change the air filter for a higher quality filter with a better gasket. If you live in a dusty area or drive on dirt roads often, you need to change your air filter much more frequently.
The best way to resolve it is to get new brake rotors. Rotors don't last forever so you shouldn't see it as component failure but more conditional premature wear. I have since upgraded to slotted rotors and high performance ceramic brake pads. The combo is quiet and low dust, but really bite down much better in hard braking to slow the car faster than the OE rotors and pads. The downside to slotted rotors is that tend to wear out faster than solid rotors and eat through brake pads, but are generally more resistant to issues of brake fade and warping due to their superior stopping performance.
Lastly, if your throttle body is dirty, you may want to change the air filter for a higher quality filter with a better gasket. If you live in a dusty area or drive on dirt roads often, you need to change your air filter much more frequently.
2025 Mazda CX-50 Preferred Hybrid
2011 Suzuki Kizashi Sport GTS 6MT (Sold)
2011 Suzuki Kizashi Sport GTS 6MT (Sold)
It does sound like the low RPM stumble that results from the CVT not releasing soon enough and then the RPMs dropping too low. The only fix that has worked for me, consistently, is cleaning the throttle body. If you didn't remove it when you cleaned it, it probably isn't all that clean. It's so easy to remove and put back, it's the only way I'd do it. You can clean it faster and better by removing it than by struggling with holding it open while you try to use a rag with solvent on it. Plus, you never have to worry about dropping the screwdriver handle you were using to hold the throttle body open down the intake. 
I've also had limited success by disconnecting the battery so the transmission has to relearn your driving habits. Coming to quick stops is the killer. Disconnect the battery to reset the computer, then don't make quick stops. Start braking early and come to long, smooth stops. You won't experience the stumble and the car learns so that when you do have to make a quicker stop, you don't get the stumble.
I've also had limited success by disconnecting the battery so the transmission has to relearn your driving habits. Coming to quick stops is the killer. Disconnect the battery to reset the computer, then don't make quick stops. Start braking early and come to long, smooth stops. You won't experience the stumble and the car learns so that when you do have to make a quicker stop, you don't get the stumble.