hi all... so the thing is like this: brake pedal is weak and with little force I can press it all the way down. I notice that when i do that the RPM goes up to 1500 and then goes back to normal. please notice that this happens ONLY when I release the brake. also if I pump the brake pedal (push it repeatedly fast) the RPM goes up to 2000 and then goes to normal. I can also feel a drop in the braking power , thus I need to push the pedal harder to stop or slow down. to note: all discs and pads are ok. the front ones are new and the back ones have very little usage. I know (from an old car , a dacia) that had similar symptoms (but in stead of the RPM going high it went low) that the issue was the booster. I have no idea what could be the problem with this one. 2002 6th Generation 2.0 accord.