Question about 1991 Buick Regal

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Intermittant, low speed, hard brake pedal, no stopping

The brake pedal feels obstructed but isn't, is accompanied by a loud noise much louder than the ABS when activated. and does not happen every time. Can be almost stopped or just beginning to accelerate from a stop and need to stop again. This is a 1998 Chevy 3500.

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Check for brake booster hose off

Posted on Apr 19, 2009

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Making whistle noise on off on run and stopping.


There are basically two types of whistle noises.

* Whistle when you get more gas (increase RPM, put gas pedal, sometimes just idling but louder when you put more gas)
This usually intake-side leak.
Intake manifold itself, intake manifold gasket (most likely), even airfilter housing, Airflow meter housing (connector), anything where air goes to engine.
usually engine get rough or unstable idle when intake leak occur.
Engine knocking or pinging may feel.

* Whistle when you decrease RPM (engine brake, reduce speed, sometimes just idling but louder when it dropping RPM)
This usually Vacuum-side leak.
There are many vacuum hoses in engine room. even inside of cabin (heater control, etc)
Try to spot where it coming from.
Vacuum also connected to Brake servo, heater control and spark timing.

Put metal or plastic pipe (small PVC pipe will work fine) to one of your ear then isolate source of noise and find where it come from.

Feb 26, 2016 | Cars & Trucks

1 Answer

When your Cadillac shakes when you start it what usually wrong


  • Knowing the warning signs of impending trouble can go a long way toward keeping your car from a highway breakdown.

    You need to develop an awareness of how your car should sound. For instance, when you turn the key to start, the gear like sound of the starter motor engaging should be smooth and sound like an electric motor working hard to crank the engine. If you notice a different sound - more like a grinding - chances are you have a starter motor problem about to happen. Let's say you're driving along and you feel the steering wheel vibrating at certain speeds. The onset of this subtle vibration could tip you off to a tire that needs to be balanced, worn steering linkage or a bulge in a tire that may be about to blow out. In any case, the vibration needs attention. Normally you shouldn't notice the sound of the exhaust system. A sudden change in your car's sound, therefore, isn't something to ignore.

    Suppose you're used to a pleasant hum, then, perhaps after a bump or when starting up the car one morning, there's a loud roaring that sound like a hot rod without a muffler. The harder you press the gas pedal. The louder the noise becomes. A noisy exhaust means the exhaust gases are blowing out under the car rather than at the rear of the car - a dangerous condition. Brakes play their own warning tune. On many cars, a scratching noise coming from the wheels that stops when you stop pressing on the brake pedal is caused by a low-brake warning device. Its purpose is to warn you that you need front brake pads. A loud grinding noise when you step on the brake pedal is an alarm that your brakes need immediate attention. The grinding noise occurs when the brake pads are totally worn away and the metal of the brake pad backing plate rubs directly on the brake rotor.

    Ignoring grinding brakes can be a costly - or even deadly - error. Shock absorbers help keep the car steady and balanced while the wheels roll over bumps and ruts. Their modern counterpart, the MacPherson strut, does essentially the same thing. You might not notice worn shocks or struts when you're simply riding around town. The safety effect of these devices comes into play at higher speeds. When you hit a bump, the tire wants to bounce like a basketball. Worn shocks or struts allow the ties to bounce out of control making steering difficult and braking less effective.

    What you may notice is the car rocking more every time you stop, assuming an almost boat like quality. Old, broken or worn out shocks and struts should be replaced to ensure safe steering and braking at higher speeds. Engine noises are easiest to hear when the car is not moving. Transmission sounds or brake noises usually occur when the car is moving. Pay attention to any new sound and keep notes - how it sounds, when it makes the sound and what difference, if any, occurs in driving when the noise is present - to help you describe it to your service dealer.

May 22, 2015 | Cadillac Cars & Trucks

1 Answer

My brakes feel like they arent going to stop.


This is most dangerous for you. I think that your power brake boost has failed, possibly due to a split vacuum hose. You can test this...
With the engine off, pump the brake pedal hard a few times. Then press down hard on the pedal and start the engine. You should feel the pedal sink perceptibly under your foot.
If this seems OK then your brake pads may be down to the metal on one or more wheels even though you here no noise. Remove the front wheels and have a look, as on p22 here (a later model).

http://www.turboninjas.com/camry/br.pdf

If the pedal feels spongy underfoot, and you can get better brakes by pumping the pedal vigorously, then there is air in the brake system, and it will need to be bled, as on p9

Dec 03, 2012 | 1988 Toyota Camry

2 Answers

Uplander shake when braking at high speed


It can be issue with brake system alignment.Get the brake assembly checked.Something is not right and out of its way causing these problem.----------
Click the help links mentioned below and go with the troubleshooting solutions to confirm what is exactly faulty in your case:-----Click the link :----Car shakes like the wheels are going to fall off http://technoanswers.blogspot.com/2012/11/car-shakes-like-wheels-are-going-to.html
----------

CAR BRAKE PROBLEMS



It can be issue with master cylinder or the problem is there is still some air there in the system,that has to be bleed.Or else the parts replaced are not aligned properly/.I suggest everything back.


There are few help links mentioned below to troubleshoot the issue.


Click the link below and follow its procedure:-----


All types of brake problems and repairs http://howtobyme.blogspot.com/2011/11/abs-and-service-light-comes-on.html

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Brake Fade Issue? http://whoisbyme.blogspot.in/2012/07/brake-fade-issue.html

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Brake System Troubleshooting? http://technoanswers.blogspot.com/2011/11/brake-system-troubleshooting.html

----------
Car Brake lines have no pressure? http://schematicsdiagram.blogspot.com/2011/12/car-brake-lines-have-no-pressure.html

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Car Brakes Dragging? http://repairhelpcenter.blogspot.com/2011/12/car-brakes-dragging.html

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Car Brakes grabbing? http://repairhelpcenter.blogspot.com/2011/12/car-brakes-grabbing.html

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Car Brakes Making Noise? http://repairhelpcenter.blogspot.com/2011/12/car-brakes-making-noise.html

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Car Brakes Pulling? http://repairhelpcenter.blogspot.com/2011/12/car-brakes-pulling.html

----------
Pulsating Brake Pedal? http://repairhelpcenter.blogspot.com/2011/12/pulsating-brake-pedal.html

---------
Spongy brake pedal? http://repairhelpcenter.blogspot.com/2011/12/spongy-brake-pedal.html

----------
Hard Brake Pedal? http://repairhelpcenter.blogspot.com/2011/12/hard-brake-pedal.html

------------
Fading Sinking Brake pedal?

http://whoisbyme.blogspot.in/2012/06/fading-sinking-brake-pedal.html

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Feels Like Brake pedal Pulsating http://repairhelpcenter.blogspot.in/2012/06/feels-like-brake-pedal-pulsating.html
============These will help.Thanks.

Nov 23, 2012 | Chevrolet Uplander Cars & Trucks

1 Answer

I have a 1992 izuzu rodeo LS 4x4 v6 and my brakes are having a hard time stopping i have replased the master cylinder the brake pads the rotors iv bled them but it still has a hard time stopping and it...


Check the caliper sliders, they may be seized causing limited brake pad contact. Also check the calipers for siezed pistons.
After bleeding the system, sometimes the proportioning valve will have to be reset manually. You can do this by having an assistant press the brake pedal and open a bleeder screw slightly on one side [ front or rear ] of the system, it may reset. If not, try doing the other side of the system.
If the brake pedal seems to be pushing back against you then either the Brake Booster isn't getting proper vacumn, or is faulty.
If the vehicle has drum rear brakes, make sure they are adjusted properly. If they are set too loose the pedal will feel spongy and low.
Hope this helps.

May 01, 2011 | 1992 Isuzu Rodeo

1 Answer

Hissing noise heard when brake pedal is appilied. changed master cylinder, rear wheel cylinders front pads and rotors what is solution?


Is there any problems with the brakes besides the noise? If theyre acting up, it could be your brake booster. It's hard to determine without more specific details, brakes always make a quiet hissing noise, depends on where, how loud, how the pedal feels...

Oct 19, 2010 | Chevrolet S 10 Cars & Trucks

2 Answers

Medium humming noise when backing up at low speeds


Probably rear brakes. Clean them up or get them looked at and try again.

Jul 14, 2010 | 2001 Honda Accord

1 Answer

1998 Lexus gs300 at idle Very loud buzzing type noise from engine


check brake fluid level.

master cylinder might be of interest, but i would check the fluid level first

Apr 08, 2010 | 1998 Lexus Gs 300

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