Question about 1983 Chevrolet Impala

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How do i check to see if ''hard pedal'' is due to the booster or the vacuum hose 1963 Impala

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It seems that your car has the power brakes. If so, then hard pedal is caused by no vacuum to booster or vacuum leak. Check all hoses to booster and replace if cracked or dry rotted.

Posted on Jul 19, 2010

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4 Answers

Why is it hard to push on the brakes


The most obvious cause for a hard pedal is simply not enough vacuum. Check the brake power booster by pumping on the brake pedal while the car isn't running. Continue pumping until you've "bled off" the vacuum from the booster. Hold the pedal down while you start the car. The pedal should go down a bit more beneath your foot. If it doesn't, then you should examine the connection between the vacuum hose of the brake power and the engine's vacuum.
Replace the brake power booster if the connection's fine, which would fix the hard brake pedal problem.

It may be your calipers need replaced. Check them for signs of wear. Look at the metal spring where the brake pads sit.
Apply tension to the pad and see whether you hear a pop. If you do, the brake pad is moving too much on the bracket. Replace the caliper. This could help the hard brake pedal.

Jul 09, 2014 | 2000 Isuzu Rodeo

2 Answers

Hard brake pedal


You can only have whatever the engine vacuum is
at any time.
Is there vacuum to the booster check valve
& is the valve working,assuming you have the
old one or a new one with the new booster.
Does fluid flow out all 4 corners?
Are the Rubber Flex Hoses Collaped
Calipers Rusted & frozen?
Did you remove the master & clean out
the moisture from around the piston
That is where you start,then flush & on to
every component in the system, if they are
on the vehicle for many years
You do realize brake fluid gets changed every
2 years on all vehicles or you got big problems with
moisture in years to come

Jul 18, 2013 | Cars & Trucks

1 Answer

1994 toyota 4runner no vacum to brake powerbooster


The check-valve could be bad or the vacuum hose from the manifold could be blocked.Did you pull the hose out of the booster and start the engine to see if vacuum is there? How did you know there's no vacuum?Some times the check-valve is in the hose and some times it is in the booster.

Mar 25, 2013 | 1994 Toyota 4Runner

3 Answers

Are there vacuum hose on the brakes hydraulic system?


NO. the vacuum is used to make the brake pedal easy to push, power brakes. the pedal would be hard without vacuum, that is why the pedal gets hard with the key off and engine not running. the problem you are having is more of a hydraulic problem.
Have the brakes checked asap. the brake system may have a leak causing the pedal to go low. check the fluid level and if it is low or empty then there is a problem, could be a rotted brake line leaking or a wheel cylinder leaking.

Dec 07, 2012 | 1997 Ford Probe

1 Answer

Brake pedal hard to push in on 1981 Ford F 100 what cause that


A hard brake pedal is caused by a failed and leaking vacuum diaphragm in the power brake vacuum operated booster. Another reason is loss of vacuum to the brake booster, buy you should hear a loud sucking noise, also the 3/8" vacuum hose can collapse from age check that as well.

Feb 24, 2012 | Ford F-100 Cars & Trucks

1 Answer

I have a 1995 K1500. I have had every part of the brake system replaced and still no brakes. when I stump on them it feels like your pushing on a brick wall, then they leak down to almost the floor be


That hard pedal is a sign of a vacuum leak on the brake booster.Check the vacuum hose on the booster for holes and with the engine running have someone push the brake pedal while someone else watches the hose to see if it is collapsing when the brake is applied.If it does that will be your problem.Replace the 3/8 vacuum booster hose.It will have to be the thick hose just for a vacuum booster or it will do the same thing if that is what is wrong.

Jan 21, 2012 | 1995 Chevrolet K1500

2 Answers

The brake pedal is hard to push during stopping


OK, a hard brake pedal is a good thing, in general. But, if the booster is not giving full power due to a vacuum leak, then stopping performance will be diminished due to the lack of vacuum assist.

Make sure the booster is holding vacuum by shutting off the car, locating the booster under the hood at the firewall, between the master cylinder and the firewall.

After a few minutes, remove the check valve from the booster by pulling it out. You should hear a loud swoosh of air going into the booster. If not, the booster may have a leak in it, or the check valve is not working.

Good luck on diagnosing the hard braking problem.

Nov 12, 2010 | 1999 Suzuki Vitara

2 Answers

Ok. Im going to try and explain this the best way I can. Today I turned my truck on, and when I did it started to idle bad. Like rumm rumm rumm. I have replaced the iacv one time already and it solve the...


All right, if it was a loose brake booster hose, then it would cause the rough idle due to a large vacuum leak.

Replacing the hose would get rid of the hard braking as well, due to a loss of vacuum to the brake booster which uses vacuum force to add to the force of just pushing down the brake pedal.

So that would explain both problems.

Good luck on running your 1996 GMC Sonoma without anymore problems.

Nov 02, 2010 | 1996 GMC Sonoma

1 Answer

Have to press hard on breaks to break on 528i bmw 2000


sounds like brake booster not working
check vacuum hose that goes to booster is ok and not leaking
engine off
pump up brake pedal several times
hold brake pedal down
start engine
pedal should sink down approx half to 3/4 way down indicating booster is working
if pedal doesnt go down when engine is running booster has leak or no vacuum supply from engine which requires great pedal effort to try and get vehicle to stop.

Jun 26, 2009 | 2000 BMW 5 Series

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