Sounds like a bad brake booster. If you are getting an extended braking distance, you may also want to check for a rear wheel cylinder leak.AnswerYou also might want to check to see if the engine vacuum is low. If the vehicle is newer than '90 or so, it probably has a sensor that determines if the rear wheels are braking. If hydraulic pressure is uneven between front and rear you will usually see a brake indicator light come on. I agree that the vacuum assist may be the culprit, but also make certain that you are getting enough vacuum to the brakes. Low vacuum can be caused by a number of problems, so it may take a little checking. I would recommend a vacuum gauge. They are quite inexpensive and can be picked up at most auto parts stores.
Also check to see if you have a vac. leak at the booster canister where the vac. line plugs into it, if the master cylinder is leaking brake fluid through the rear seal of the spool valve it can enter the power brake booster and destroy the diaphragm seal causing the power brake booster to fail....thus hard as heck brake pedal(meaning you have no vacuumn assist) it's easy to check for a brake fluid leak....just pull the master cylinder mounting bolts off the power brake booster(either 2 or 4 bolts or nuts) and look at the rear side of the master cylinder seal to see if brake fluid is prevalent, also with a light look inside the power brake booster for tell tale signs of brake fluid leakage.
Do mother birds really abandon their chicks if a human touches them?
Are Danny Devito and Joe Devito related?
Powder of ground roasted cacao beans with most of the fat removed?
A person who sells clothes is called?
Which is bigger 1.5 or 1.25?
Is Kelly Preston a smoker?
What times what equals 7?
Mrs Smith has nine children half of them are girls . how can this be true?
If you could make one change to the education system, what would it be?
Is it safe to take a shower during a thunderstorm?
Why is the clock tower in London called Big Ben?
Why don't satellites crash into earth?
Where is the origin of the Panama hat?
Have you ever crashed a wedding or had your wedding crashed, if so what happened?
How many times did Joe Biden run for president?
What is the world’s oldest soft drink?
What does y2m mean in knitting?
What is distinction percentage in ICSE?
BA-28 which is a recommended water-skiing safety practice?
What happened to Simon o'brien's eye?
What is the sequence of the mRNA made from the gene TTACAGGTCCCA?
What is your primary responsibility when other boats are in your area?
What is Alan Hansen doing now?