Veh, comparisons. that be bad idea.
power assisted brakes very greatly in that word POWER.
first off, the brakes need to great.
then the assist active
try driving with the booster (safely) defeated. (pull hose and plug it)
is that 6 times harder to brake, that is normal.
if the same, then the booster is failing, they can.
SOURCE: 02 jeep grand Cherokee 6 cyl seems to idle too
check for vacum leaks using a spray bottle of water when the idle frops you found it if water wont work try starting fluid or carb cleaner if useing these the idle may increase when you find it replace/repair the hose and see if its still happending could also be a combination of things idle speed control motor idle air control motor mass air flow sensor good luck
SOURCE: i hear a grinding noise when i hit the brakes...replaced the brakes and its still there
check you brake pads, there might be no pad left so you stopping metal to metal if this is the case you will need brake pads and rotors
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