What is the problem, if you experience pulsating in stirring wheel of the car upon braking?

Turning rotors when they warp is a bad idea. The warping will just come back. Get a replacement mechanic. Replace the rotors. Skip the pads - they should still be fine.

I'm surprised that you got as much time out of those rotors before they warped again.

If you have recurrent warping - consider high performance slotted/drilled routers. Also, after you stop, let the car roll just a few inches after coming to a complete stop - it may help reduce the possibility of warping by releasing "trapped" heat from under your pads.

Yes it could be problem! But sitting probably isn't cause!

Now it is possible that something is making brakes "drag", - which causes discs to get extra hot! The pulsating is bacause the disc(s) have "tempered spots" from heat (and uneven cooling)! So the softer part wears faster than harder part, - leading to spots on disc that are "thicker" than others, --When the wide part goes through, it "pushes some fluid back towards brake pedal, - or brakes unevenly for an instant, since thinner part rolls through easier! The spotty pressure makes the wheel sort of 'shake"!

If these are "new discs", they can be "cut" (or re-ground) slightly thinner to get through tempered parts, and then they willl "run evenly"! -- And stop pulsating! It could be just one disc, and it could be both! Only a certian amount can be removed before it gets "thinner" than legal minimum", and is then scrapped!

When you have brakes worked on again, have them check to make sure that calipers are not hanging up, or fitting too tightly in caliper frames! ---- As for brake-pads, if they are not worn excessively, they can be used some more, -- but if have been hanging up, they willl possibly be too worn to use, as they will be bad in a few thousand miles and need repalced!

The dust is a normal "byproduct "of disc brakes! But if there is really a lot (to point of being excessive), - it may be due to "dragging brakes"!!

Yeah, widely used rule of thumb, if the guidance wheel shakes as you brake the front rotors are warped. If the pedal pulsates(In a NON-ABS adventure) the rear rotors(If rear disc) or rear drums are out of round. That suggested, in the adventure that your motor vehicle is rear disc the rear pads are likely correct off it besides on the grounds that rear disc is mostly a junk gadget besides. you may get the rotors became, yet reckoning on the make/kind, it is often times merely besides to get new ones.

To help keep this from happening brake gently when you first start driving, This will let the rotors heat gently to the a operating temp. If you heat the rotors to fast they will warp. so a few gentle stops befor hard stops will help.

Hi..

This is a common phenomenon observed when the both front brakes are not applied simulteneously.

This is becaue when only one wheel is braked other wheel not, the vehicle experiences a couple force which tries the vehicle to yaw. So does the steering.

Do check whether the front brakes are well installed or not. And also the pressure pipes.

Hope this helps you.

Bye.

the "pulsating" feeling is most often a high spot on the rotors. have them turned again. it's the cheapest option. if that doesn't do it, try replacing them again. if it's still there i would have the a.b.s. looked into, but that's only if your car has four wheel anti lock brakes.