Occasionally, when applying the foot brake, there appears to be no power assisted braking. If i immediately lift off the brake pedal and reapply, the brakes return to normal and all is ok once again! I've checked the condition of the front disc brakes, which were in good order. An accompanying ticking sound (from around the pedal/feet area?) can also occasionally be heard when experiencing this braking problem. 2003 Tribute brakes intermittently pulse with thumping noise. No ABS light on though. Braking seems to be soft when this happens. DOES NOT HAPPEN ALL THE TIME! Thought is was ABS but had the recall check at a dealer and everything is fine there. Also front brakes are new and in good working order. Suggestions??????
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this really sounds like a broken motor mount / trans mount. An easy way to check is have someone sit in the car and shift into reverse, then to neutral, then to drive. Have your "assistant" do this repeatedly with the hood up, parking brake ON and foot FIRMLY applying the brakes while you watch the motor move. if you can see a big difference in "jump" between reverse and drive, that is a bad mount. The motor will lift or "jump" higher on the broken mount side. if your really not sure then try a gentle power brake in each direction.
hissing sound is a vacuum leak somewhere on the power assist part of the system as in a bad booster..try this test..with the car off..push the brake pedal down a few times and release all the vacumm and see how far the pedal goes down..after a few pumps with your foot it should become hard and drop just a bit..once it feels"solid' or hard..hold the pedal down with moderate pressure.. and start the car back up..the pedal should drop a bit further but less than halfway.. if it drops further it needs attention..good luck especially if it goes almost to the floor..
If your brakes were "locking up" as you describe, it would be interesting to see. Brakes rarely self-apply. Lockup may occur after you apply the brakes as they may stick and won't release, but to have them just apply while driving is almost impossible. What you are describing sounds more to me like a massive vacuum leak. What this will do is reduce intake vacuum and steal all the power from the engine, and the brake pedal will go stiff as a result of the power brake booster losing its vacuum assist. You need to find the source of the vacuum leak and correct it.
Pulsating brakes are often caused by warped brake rotors. In order to check for a brake that isn't releasing I would suggest lifting one wheel at a time, applying the brakes and immediately checking if that wheel turns freely. Repeat on all 4 wheels. If you find one that isn't turning freely you'll have to address the problem with that brake.
Electronic Park Brake (EPB)
On some 2003 MY-on S-TYPE vehicles, a customer may report a concern of premature
parking brake pad wear or the brakes binding. This condition can result if the electronic
park brake (EPB) system is not re-calibrated after the removal of the rear brake callipers
to replace the brake pads.
Should a customer express concern regarding the above, refer to the calibration
procedure detailed in this bulletin.
1. Reset the EB module:
a. Switch off the ignition.
b. Disconnect the battery for 30 seconds. For additional information, refer to STYPE
Workshop Manual Section 414-01.
c. Reconnect the battery.
2. Start the engine.
3. Firmly apply and release the foot brake five times.
4. Confirm that the message NOT CALIBRATED" or APPLY FOOT AND PARK
BRAKE" is displayed on the instrument cluster message center. This indicates that
the parking brake is in calibration mode.
5. Lightly press the foot brake pedal.
6. Apply the parking brake by using the EB switch.
7. Release the parking brake.
8. Release the foot brake.
9. Confirm that the brake warning lamp is no longer illuminated on the instrument
pack and that the NOT CALIBRATED" message is no longer displayed in the
10. Apply and release the EPB five times to ensure no error is present. _____________________________________________________________________________
NB: It is also possible the actuator is bad though.
Going by your description I think it could be something different, I would have the brake master cylinder checked, if you are suffering brake failure and shuddering it sounds like your callipers arent getting equal pressure when you apply the brakes. Or a freat lack of pressure to suffer brake failure. I hope this helps.
Sound's like their is a problem with the right hand rear light cluster.The reason it only happen's going down a hill is you applying the brake. The only place the brake and indicator light's come together is the rear clusted. To check this apply the hand brake gently with the button held in instead of useing the foot brake. This may not be the fault but it is worth a try as it seems the most likely problem.
ther are no lubriction points on the driveshaft,if you rev the engine does the noise get louder or go away?try power braking the car ,make sure e-brake works properly if so apply it ,place the car in drive,place your left foot on the brake ,right on the accelerator,rev to 2000rpm for no more than 10 sec, this is like puttting a load on the drive train,this may unmask your noise,it appears this may be some sort of exhaust rattle since nothing is moving undereath car
It may be that your power assist booster behind the brake master is leaking and when you apply the brakes it robs all your vacuum. Try plugging the hose that goes to the power assist boost and apply the brakes. If the engine stayhs steady thats your problem!