abs pulses when stopping
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abs pulses when stopping
When coming to a stop, the abs pulses in the break pedal on my "97" Explorer Sport, only for about 2 seconds and then quits.
My wife drove the truck with the parking break engaged and the shoes are down to the metal. Are these two things linked ?
Any help appreciated, Thanks in advance
My wife drove the truck with the parking break engaged and the shoes are down to the metal. Are these two things linked ?
Any help appreciated, Thanks in advance
Posting Guru
Joined: Dec 2002
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From: Billings MT
abs pulses when stopping
1997 Windstar...had to replace the rotors at 35,000 miles due to warpage. Brakes never made a noise and wore down to the rivets without warning.
I don't know what difference there is in the rotors, but that design is crummy. After another 15k, the second set of good brake pads was shot.
Have the rotor turned, and you should be good to go.
I don't know what difference there is in the rotors, but that design is crummy. After another 15k, the second set of good brake pads was shot.
Have the rotor turned, and you should be good to go.
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abs pulses when stopping
I was not specific enough in my description. I can actually here and feel the abs breaks kicking in for 2 or 3 seconds when coming to a stop, and have a feeling it may be do to the parking break shoes being worn to the metal. Does this sound right?
Thanks ahead of time
Thanks ahead of time
Posting Guru
Joined: Dec 2002
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From: Billings MT
abs pulses when stopping
The Windstar was mom's. She swore that it was the ABS. She said the same things you did. Only for a few seconds and the pedal pulses under foot.
Now, it could be one of the ABS sensors, not discounting it. But, a warped rotor or drum can do the same thing.
Now, let me ask this. Is it a slow pulse or a very rapid pulse? ABS pump something like 60 cycles a second. I know someone has the specs on it, but it seemed to me that it was in that area. If it is a rotor or drum, it will be much slower and decrease with speed. I don't know if ABS decreases with speed, or not.
Does this help? Not to be overly simplistic, just trying to ask all the questions I can think of.
And if it truely is ABS, it is just a coincedental action that the sensor went and the brake shoes got worn down to the bare metal.
That makes me think of something else. This was happening somewhere else on here after they replaced the brake shoes. Something special about bleeding ABS systems. Have you replaced the shoes already? Did a shop do it or you? If a shop did them, I would think about taking it back and telling them that you don't think they got bled right.
Ideas. I love brainstorming.
Now, it could be one of the ABS sensors, not discounting it. But, a warped rotor or drum can do the same thing.
Now, let me ask this. Is it a slow pulse or a very rapid pulse? ABS pump something like 60 cycles a second. I know someone has the specs on it, but it seemed to me that it was in that area. If it is a rotor or drum, it will be much slower and decrease with speed. I don't know if ABS decreases with speed, or not.
Does this help? Not to be overly simplistic, just trying to ask all the questions I can think of.
And if it truely is ABS, it is just a coincedental action that the sensor went and the brake shoes got worn down to the bare metal.
That makes me think of something else. This was happening somewhere else on here after they replaced the brake shoes. Something special about bleeding ABS systems. Have you replaced the shoes already? Did a shop do it or you? If a shop did them, I would think about taking it back and telling them that you don't think they got bled right.
Ideas. I love brainstorming.
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abs pulses when stopping
I understand your skeptisism, but I can tell the difference in a warped rotor or drum and what I am experiencing with this abs problem, having driven more than my fair share of clunkers in my time.
I got to looking into changing the parking break shoes myself and saw how involved it became when reading my Haynes repair manual and left well enough alone until I gain the courage to take it in to a Ford "certified" mechanic. I have changed the break pads myself ,but being a back yard mechanic I had never seen a seperate set of shoes on the inside of the disc/drum for the parking break.
I had someone say something about break dust getting into a (tone?) ring and causing problems.
Thanks again for your response, Dealer service garage here I come, I'll bring the vaseline with me!
I got to looking into changing the parking break shoes myself and saw how involved it became when reading my Haynes repair manual and left well enough alone until I gain the courage to take it in to a Ford "certified" mechanic. I have changed the break pads myself ,but being a back yard mechanic I had never seen a seperate set of shoes on the inside of the disc/drum for the parking break.
I had someone say something about break dust getting into a (tone?) ring and causing problems.
Thanks again for your response, Dealer service garage here I come, I'll bring the vaseline with me!
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Joined: Mar 2003
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From: New Canaan, CT
abs pulses when stopping
It could be that the brakes wore so low it is biting harder. As brakes were down they have a harder compound. It's not hard to lock up the rear brakes. It could be one or both rear brakes looking up for a few seconds. Does it do the noise only when you stop normal or just to test it if you stop real slow will it make the noise? For safety I would change the brakes since the truck was diven with the E brake on. riving with the E brake on with make the brake shoes glazed if they survived the heat so be safe and change them and see if that helps.
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From: Kelseyville, CA
abs pulses when stopping
I suppose it is possible for the dust from the break pads to contaminate the ABS ring/sensor, but only on the front. Your rear ABS sensor is mounted to the top of your rear differential. Also, driving with your parkin brakes on should not destroy anything but your parking brake shoes. Your ABS, rear pads and rotor surface will be unaffected. If you are sure that it is related to your ABS, then a possibility is one of your ABS sensors (two front, one rear) may have failed causing your ABS computer to think a wheel is locking up.
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Joined: Jun 2000
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From: CANADA
abs pulses when stopping
Hi Guys, I had this problem with my 97 ever since I test drove it back in December. Anyway, after complaining to the dealer to fix it about 3 or 4 times they FINALLY replaced the front ABS sensors and that got rid of the problem. I would suggest that first.
Hoppy
Hoppy
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