2001 Chevy Blazer BRAKE THUMPING?

Tiny
DNANTZUSN
  • MEMBER
  • 2001 CHEVROLET BLAZER
  • 6 CYL
  • 4WD
  • AUTOMATIC
  • 165,000 MILES
WHEN I DO MED TO HARD BRAKING WITH MY BLASER ZR2 IT FEELS LIKE THE THE 4WD IS TRYING TO ENGAGE. IT FEELS LIKE WHEN IN NEUTRAL TRYING TO ENGAGE 2WD LOW WHILE SLOWING ROLLING. ANY IDEAS?
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Friday, March 19th, 2010 AT 10:48 AM

7 Replies

Tiny
JACOBANDNICKOLAS
  • EXPERT
Could it be the ABS turning on?
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Sunday, March 21st, 2010 AT 1:06 AM
Tiny
DNANTZUSN
  • MEMBER
Partna, I'm just an old retired Navy guy! I don't have the slightest idea if it's the ABS. I can almost feel gear cogs thru the brake pedal when it happens. Damest thing! Never felt anything like this before.
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Sunday, March 21st, 2010 AT 1:37 PM
Tiny
JACOBANDNICKOLAS
  • EXPERT
Navy. Thank you for your service to our country. What is left of it. I wish I knew how to change things. I'm in my 40's and have many concerns for my younger children.

Regardless, based on your description, it sounds like you ABS is turning on. If the ABS light is not on, then there is a chance it is just dirt that is causing the problem. At each wheel, there is a sensor (magnet) and a stator. When the wheel turns, a low current is produced. If a tire skids, the current stops, tells the computer there is a lock up, and the system regulates pressure to that wheel to prevent it from skidding. If there is dirt, grease. That is covering the stator, the voltage is lost and the computer does its job, prevent the tire from skidding. As a result, you get an odd feeling from the brake pedal.

You can check them yourself. They are located right behind the backing rotor / plate at the end of the axle. If you have someone change your oil, ask them to check for you and also have them check the wiring to the sensor to make sure there is no damage.

Let me know what you find or if you have other questions.

Joe
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Sunday, March 21st, 2010 AT 9:33 PM
Tiny
DNANTZUSN
  • MEMBER
New problem now. When it rains this this piece of * #@ cranks but won't start. New ICM and have spark to plugs. Thinking I should have left this on lot!
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Monday, March 22nd, 2010 AT 7:03 AM
Tiny
JACOBANDNICKOLAS
  • EXPERT
Will it start with starting fluid?
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Monday, March 22nd, 2010 AT 7:17 AM
Tiny
DNANTZUSN
  • MEMBER
Was told srarting fluid was a big NO NO! Want me to give it a try?
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Monday, March 22nd, 2010 AT 7:54 AM
Tiny
JACOBANDNICKOLAS
  • EXPERT
It won't hurt.
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Monday, March 22nd, 2010 AT 9:48 AM

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