Brake pedal Pulsating?

Brake Pedal Pulsates When Brakes are applied

This pulsate is noticed on Passenger Compartment.

Many car drivers have complained about this problem.

This problem is due to few possibilities.That are to be checked.

1 Inspect Brake Drum Specs: Brake Drum Out of Adjustment, Out of Round, or Cracked.

2 Inspect Brake Drum: Unevenly Worn or Out of Round Brake Drum(s).

3 Inspect Brake Rotor: Incorrectly Machined Brake Rotor.

4 Inspect Wheel Bearing-Front:  Incorrectly Tightened or Installed Wheel Bearing.

5 Inspect Wheel Bearing-Rear: Incorrectly Tightened or Installed Wheel Bearing.

6 Inspect Wheel Nut:  Loose, Worn, or Damaged Wheel Nut(s).

7 Inspect Rear Axle:  Bent Rear Axle.

This possibilities are to be checked.The problem can be from any of this areas.

This details will help.
Thanks.

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In throttle body area there are two lines one for the actually gas pedal and the other for the cruise control. What happens is the cable gets stuck, causing the engine to rev high, normally if you just drive around the cable goes back down.If all this checked ok and there is power brake system on your car then its Vacuum leak.
Vacuum leak sounds right. It might be inside the booster. Try plugging the line to the booster to see if it idles better. Or listen carefully under the dash for a hiss when you push on the brake.
The booster is on the firewall in front of the driver. In other words, it is to the back right of the engine compartment as you look under the hood.If all checked ok,then it can be Faulty brake booster causing the fault.

See how the brake booster looks.

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This details will help you.

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If you need dis-assembly or replacement instructions for any other auto/car part, or you want to ask question related to your car/truck jeep problem then please leave the comment with your details, so I can provide you the required instructions and solutions.

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How to Replace Power Brake Booster on 1996 GMC Jimmy?

Most all modern vehicles use power assisted brakes. A vacuum line from the intake manifold to the brake booster provides a source of vacuum.Most power brake boosters are vacuum operated devices requiring approximately a minimum of 17 inches of vacuum to operate. The brake booster is the round, black canister located at the back of the engine compartment on the driver's side of the Vehicle.It uses vacuum from the engine to increase the force that your foot applies to themaster cylinder.

The power brake booster is a tandem vacuum suspended unit. Some models may be equipped with a single or dual function vacuum switch which activates a brake warning light should low booster vacuum be present. Under normal operation, vacuum is present on both sides of the diaphragms. When the brakes are applied, atmospheric air is admitted to one side of the diaphragms to provide power assistance.

Follow the procedure mentioned below for REMOVAL & INSTALLATION of power brake booster on your GMC Jimmy.

1994-97 Models

See Figures 1 and 2
Apply the parking brake and block the drive wheels.
Remove the master cylinder-to-power brake booster nuts, then reposition the master cylinder and combination valve out of the way; if necessary, support the master cylinder on a wire to prevent damaging the brake lines.
When removing the master cylinder from the power brake booster, it is not necessary to disconnect the hydraulic lines, therefore the brake system should not have to be bled.
Disconnect the vacuum hose from the power brake booster.

See the diagram below:----

 


Fig. Fig 1: Common power brake booster attachment

From under the dash, remove the retainer and washer from the brake pedal on 1994 utility models. On all other models, remove the retainer and brake switch from the brake pedal.
Disconnect the pushrod from the brake pedal.
From under the dash, remove the power brake booster-to-cowl retaining nuts.
Back under the hood, remove the power brake booster and the gasket from the cowl.
To install:

Position the booster to the cowl using a new gasket.
Install the bo oster retaining nuts and tighten to 16 ft. lbs. (22 Nm) 1994 utility models, 24 ft. lbs. (32 Nm) on 1994 pick-up models and 27 ft. lbs. (36 Nm) on all 1995-97 models.
Connect the pedal pushrod and install the washer or switch and the retainer.Connect the vacuum hose.

Fig. 2: Checking the piston booster rod using the gauge tool
For all vehicles cover ed in this guide, gauge the booster rod:
Apply 25 in. Hg (85 kPa) of vacuum using a hand held vacuum pump or apply maximum engine vacuum.
Chec k the maximum and minimum rod lengths using J-37839 or an equivalent pushrod height gauge.
If the piston is not within limits, install a service adjustable piston rod and adjust it to the correct length.
Reposition the master cylinder and combination valve bracket to the booster studs, then secure using the retaining nuts. For details, please refer to the master cylinder procedure located earlier in this section.
Start and run the engine, then check for proper booster operation.

This details will help you.

----------

If you need dis-assembly or replacement instructions for any other auto/car part, or you want to ask question related to your car/truck jeep problem then please leave the comment with your details, so I can provide you the required instructions and solutions.

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Where is ABS/TCS module located on 2005 Cadillac Deville

ABS/TCS Module is also called as EBCM. EBCM means Electronic Brake Control Module.
This module is located at the front left lower corner of the engine compartment, under the air cleaner housing. The EBCM is attached to the brake pressure modulator valve.

See sample diagram below:This will help you to understand its exact location.

In the Diagram :---
1. Secondary air injection.
2. Electronic Brake Control Module.
3. Brake pressure modulator valve.

This details will help you.

----------

If you need dis-assembly or replacement instructions for any other auto/car part, or you want to ask question related to your car/truck jeep problem then please leave the comment with your details, so I can provide you the required instructions and solutions.

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If you need dis-assembly or replacement instructions for any other auto/car part, or you want to ask question related to your car/truck jeep problem then please leave the comment with your details, so I can provide you the required instructions and solutions.


The details for this problem are as follows.

If the emergency brake pedal is stuck in the down position, then the rear brakes may have been dragging for quite a while. If you have not had a brake job done since you purchased the car then take the rear wheels off and inspect the brakes (as long you have the car up to work on the cables anyway). You may have some severely worn parts back there.In many cases the brake cable gets rusted inside the cable housing, especially if you live in an area of high winter salt use on the roads. You may be able to access the forward end of the cable from underneath the car to disconnect it or worst case, the cable may have to be removed from two points on the rear brake assemblies.This procedure will help,you to test and confirm the problem,so as per that you can get the repairs done.

Thanks.

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http://howtobyme.blogspot.com/2011/11/abs-and-service-light-comes-on.html

 

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http://howtobyme.blogspot.com/2011/11/abs-light-stays-on-but-brakes-work-fine.html

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http://howtobyme.blogspot.com/2011/11/vcs-maintaince-required-on-toyota-camry.html

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http://howtobyme.blogspot.com/2011/11/vcs-and-abs-lights-go-on-and-off.html

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http://howtobyme.blogspot.com/2011/11/abs-brake-lights-warning-indicator.html