Question about 1990 Nissan 300ZX

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Brake pedal pulsating and steering shacking - 1990 Nissan 300ZX

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Classic sympton of warped rotors and/or drums out of round.

Posted on Oct 07, 2010

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When breaking, my break pedal begins to pulsate when stopping. Also, the steering wheel begins to shake when breaking.


Usually a sign one of the front brake rotors is out of round. It could also be something wrong with the abs but I doubt it.

Jul 17, 2014 | Dodge Cars & Trucks

1 Answer

What makes it shakes


Sounds like bad brake pulsation, meaning warped rotors. When rotors are warped , they push the caliper piston in and out ,causing the brake pedal to pulsate and shake the steering wheel. I would start with replacing the front pads and rotors, and if you have drum brakes in the rear, have those cleaned and adjusted for a more balanced braking system.

May 15, 2014 | 2001 Plymouth Neon

1 Answer

Brake pedal shakes/pulsates


warped brake rotors. don't resurface just replace them. if the steering wheel shakes its the front, if the seat of your pants shakes its the rear. in most cases the front will warp first

Mar 14, 2014 | 1997 Jeep Grand Cherokee

1 Answer

Low brake pedal


Your ABS was working.

Oct 27, 2013 | Cars & Trucks

1 Answer

Power steering hard and brakes are very weak


It would appear that your vehicle has a Hydroboost system (many Chevys do), which uses hydraulic pressure from the power steering pump to also boost the brakes. Check your power steer fluid level. If it is OK, then either you have air in the system, or the pump is failing. Also check all the hoses and pipes between the pump and brake master cylinder for leakage.

Mar 23, 2012 | 2002 Chevrolet Silverado 2500HD

1 Answer

Brakes are pulsating in pedal. we've changed calipers, turned drums and rotors, replaced pads, bled brake lines. what could be causing the pulsating and egg out feeling.


Your rear drums are out of round (warped). Eventhough you turned them the problem will not go away because they have hot spots in them that turning can't remove. You need to replace them with new ones to solve this problem. Pulsing pedal is rear brakes and a shimmy in the steering wheel while braking is in the front brakes.. Good luck I hope this helps you out.

Jul 14, 2011 | 2004 Saturn VUE

2 Answers

When braking on my '04 Suburban, it pulsates like it has a warped brake rotor, but rotors are true (all four), and there is no correlating pulsation in the brake pedal, nor in the steering. Also, this...


Try pulling the fuse for the anti-lock braking system. If the problem goes away with the ABS disabled, check the wheel rotation sensors for problems, especially cracked or broken mounts or wiring issues. I'm thinking a sensor is dropping out when it gets heated by the brake and feeding bad data to the controller. The controller than treats it as a low traction situation and starts pulsing the brakes. If this is the case, you would see an ABS or Low Traction warning light on your dash.

Another possibility is a worn or loose suspension component oscillating under braking stress. In particular, check the shock absorber mounts. You could also have a pad that chatters instead of gripping the rotor cleanly - this may leave marks on the rotor, and would probably produce an audible noise.

Dec 23, 2010 | Chevrolet Suburban 1500 Cars & Trucks

1 Answer

Steering shacks replaced steering damper still shacks


shakes?or shacks?Let's just say that you mean shake.If your brake pedal pulsates,replace the rotors.If your steering wheel shakes(low speed)broken belt in front tire.Jack up one tire enough to clear the ground,spin it.Spins nice,lower and jack up the other.Spin that one,if the belt is broke it'll be very noticable.While up in the air check the lug nuts,if they're loose it can make the steering shake too.If the shake is at highway speed,bad shocks or tie rods or ball joints or a combination of these.Jack up a front tire and try to move it(Key turned off to lock steering).If it moves top to bottom,ball joint.Side to side,tie rod.Doesn't move,shocks.The worst could be a bad hub bearing,but you'd hear it and you said nothing about any noise.

Nov 05, 2009 | Harley Davidson XL 1200 C Sportster Custom...

2 Answers

Stuttering brake pedal


could possibly be vacuum assist check valve is defective and you are feeling the engine vacuum pulsations. Easy ck, Inexpensive, easy replace. Good luck. If you will, let me know. please

May 11, 2009 | 2001 Hyundai Santa Fe

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