Brake Pedal Flutter
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Senior User
Joined: Sep 2000
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From: Flat Rock, Michigan
Brake Pedal Flutter
2002 F150 4X4
When stopping, the pedal will go a little lower to the floor and you will feel some slight pulsating in the pedal at the very last inch of stopping. This happens 7 out of 10 times and the ABS light is NOT on. It feels similar to stopping on ice when the brake pedal pulsates.
Is this a symptom of a bad ABS sensor? The front and rear rotors and pads have less than 4,000 miles on them. This happened before the brakes were replaced so it is not the new rotors or pads.
If it is a sensor, how do you know which side is bad? Thanks for any advice. I want to get this fixed right.
When stopping, the pedal will go a little lower to the floor and you will feel some slight pulsating in the pedal at the very last inch of stopping. This happens 7 out of 10 times and the ABS light is NOT on. It feels similar to stopping on ice when the brake pedal pulsates.
Is this a symptom of a bad ABS sensor? The front and rear rotors and pads have less than 4,000 miles on them. This happened before the brakes were replaced so it is not the new rotors or pads.
If it is a sensor, how do you know which side is bad? Thanks for any advice. I want to get this fixed right.
Post Fiend
Joined: Dec 2006
Posts: 9,111
Likes: 3
From: Lexington Mo
It still sounds like you have a warped rotor. At work if I install new rotors I religiously machine them, and 99% have some warppage to them.
Get them on a brake lathe, bet that's you're problem.
Bob
Get them on a brake lathe, bet that's you're problem.
Bob
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Senior User
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From: Flat Rock, Michigan
I know how a warped rotor feels when stopping. This is not the same feel. The rotors are raybestos as are the pads which are raybestos ceramic. I did not buy cheap brake parts.
I will not overlook the possibility that the rotors are warped because $*@! happens.
The brakes feel good and strong when stopping, there is no pedal pulsations, pulling, or steering wheel wobble when applying the brakes.
It only happens at the final second of coming to a complete, total dead stop. The pedal sinks slightly and it feels as if you have no braking power. You can faintly hear a grinding type of sound.
Lock up your brakes on some ice or wet pavement and you will feel the ABS kick in. My problem feels similar to that but only at a fraction.
I will not overlook the possibility that the rotors are warped because $*@! happens.
The brakes feel good and strong when stopping, there is no pedal pulsations, pulling, or steering wheel wobble when applying the brakes.
It only happens at the final second of coming to a complete, total dead stop. The pedal sinks slightly and it feels as if you have no braking power. You can faintly hear a grinding type of sound.
Lock up your brakes on some ice or wet pavement and you will feel the ABS kick in. My problem feels similar to that but only at a fraction.
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Joined: Jul 2007
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Originally Posted by hood
The brakes feel good and strong when stopping, there is no pedal pulsations, pulling, or steering wheel wobble when applying the brakes.
It only happens at the final second of coming to a complete, total dead stop. The pedal sinks slightly and it feels as if you have no braking power. You can faintly hear a grinding type of sound.
Lock up your brakes on some ice or wet pavement and you will feel the ABS kick in. My problem feels similar to that but only at a fraction.
It only happens at the final second of coming to a complete, total dead stop. The pedal sinks slightly and it feels as if you have no braking power. You can faintly hear a grinding type of sound.
Lock up your brakes on some ice or wet pavement and you will feel the ABS kick in. My problem feels similar to that but only at a fraction.
i believe it is the ABS kicking in when it shouldnt be, because it is exactly what happens when the brakes are trying to lock up. It is doing it about 70% of the time i brake when i am about to come to a complete stop. More recently it is doing it earlier and longer, and i am worried it may be getting worse/ dangerous.
I have had it looked at multiple times, and no one can figure out what is the cause... any ideas what it is anyone?
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Joined: Jul 2007
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Originally Posted by FastTrakFord
My 99Ford was doing this and it was Front Caliper piston trying to stick ..the reason i found it was when changing pads it was real hard to push back in.
- would anything causing the brakes to stick cause the ABS to do that? it feels almost as if that might be the case
I dont have a lift or oversized tires either... its not really a crunching noise but a groaning noise, and i only lose alittle braking momentum, and almost sputters to a stop
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From: Flat Rock, Michigan
update:
It was both front abs sensors. Something about a weak vacuum signal. The dealership replaced both front hub assembilies because they said the sensors are built into the hubs. They billed the insurance company $750.
They could have replaced the whole truck if they had wanted to because i still have 5,000 miles left on my easycare warranty.
Prior to that, they replaced the rear vehicle speed sensor and the whole rear end differential. They found metal shavings in the rear vss and found that the clutches in the differential were bad. So they replaced that too! $1200.
Zero dollars deductible with a free loaner car.....gotta luv those extended warranties!!!
But all this makes me wonder what kind of
lemon do i have? This truck looks great but has had some issues....bad fuel pump, bad a/c compressor, bad idler arm, warped exhaust manifolds (both), and now the rear end and the front hubs. This truck has never pulled anything and has never been off road.
Sorry, but my next truck will NOT be a ford.
It was both front abs sensors. Something about a weak vacuum signal. The dealership replaced both front hub assembilies because they said the sensors are built into the hubs. They billed the insurance company $750.
They could have replaced the whole truck if they had wanted to because i still have 5,000 miles left on my easycare warranty.
Prior to that, they replaced the rear vehicle speed sensor and the whole rear end differential. They found metal shavings in the rear vss and found that the clutches in the differential were bad. So they replaced that too! $1200.
Zero dollars deductible with a free loaner car.....gotta luv those extended warranties!!!
But all this makes me wonder what kind of
lemon do i have? This truck looks great but has had some issues....bad fuel pump, bad a/c compressor, bad idler arm, warped exhaust manifolds (both), and now the rear end and the front hubs. This truck has never pulled anything and has never been off road. Sorry, but my next truck will NOT be a ford.
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