Question about 1996 Toyota RAV4

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Brake system or booster

When you step on the brake the pedal slowly goes down that you have to pump it again to make it stop. it is as if no booster is assisting  the braking system. there is no brake fluid leakage on the master cylinder or on the tires

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Jeff Hammack

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Is your pedal hard to push? if so maybe booster. does your pedal slowly drop all the way to the floor? if so definately the master cylinder (leaks internally)

Posted on Apr 07, 2009

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3 Answers

Even after replacing front and rear brakes, the pedal goes nearly to the floor (but does stop the vehicle). What do I need to do


Brake booster has gone bad or u have a vacuum leak. Check the seals for leaks around booster where the. Fluid goes in the plastic holder. Check for vacuum leak going to break booster

Apr 15, 2015 | 1999 Plymouth Breeze

2 Answers

Brakes are hard to depress causing stopping problem


1: inspect all brake linings first.
no pulling left or right braking?
the car has 100% full manual brakes. if the brake booster fails.
(its only and assist !!! for 50lb small folks)
so does it? it takes more pedal pressure but has 100% full braking.
this is no accident its by design.
make sure none of the brake shoes/pads are soaked in DoT3/4 fluid
or grease or gear oil.
and no brake fluid leaks end to end, this is really #1 on all cars.
look, then look again. even behind and in front of the master cylinder.
look at tires (inside for fluid leaks>)
2: do the booster test. did the vacuum hose to it fall off?
or got pinched, or ?

google brake booster test
if ABS system. get it all checked,
if ABS get the ABS scanned.

if you cant stop correctly,,,,???? , dont drive.
get it fixed.

May 06, 2014 | 1999 Jeep Wrangler

1 Answer

My brake pedal goes all the way to the floor


Brake pedal goes to the floor? When does it happen. That is the most important piece of information. Most brake systems are power assisted via vacuum from the engine. Your brake booster is what makes the "power assist" work. There are some specific times when you will feel your brake pedal "fade" to the floor and it is normal due to the cycle of the brake components operation.If your brake pedal goes to the floor every time you step on it, stop driving and get to a repair facility! If the pedal is working when driving and the vehicle seems to be working as it always has, then chances are there is no concern. To be on the safe side, have it checked the next time you are in for any other type of service.There is a sensor inside most brake reservoirs that activates the indicator light in your instrument cluster when the level is lower than it should be. As your brake pads wear down, the system requires more fluid so the level at the reservoir drops setting the light. Same thing if there is a leak. The fluid level drops and the light goes on. This brake fluid leak would most likely be combined with a spongy pedal or a pedal fade every time you step on the brakes. A leak would also almost always have a wet area around the leak. Sometimes the leak can be internal to a part of the car you cannot see, so don't count on it.One easy way to check most brake boosters and the brake system for leaks is to turn the vehicle off and pump the brake pedal. Every time you depress the pedal you should feel the pedal "height" come up and the pedal get harder. After a few firm pumps of the pedal, hold it down. Leave pressure on the pedal for 20 seconds or so. Does the pedal move slowly (or quickly) to the floor? If so then there is a leak somewhere in the system. Keeping pressure on the brake pedal, start the vehicle. Does the pedal no drop? It should. That is the power assisted vacuum kicking in as the engine starts to run.The bottom line is that we are talking about your brakes. Your life, your passengers lives and the lives of others on the road around you depends on that system working properly. If you have any doubts, or feel uncomfortable, take it in to have it looked at. Know specifically what it is doing so that you can have your repair facility look at what you are feeling and tell you if

Oct 29, 2011 | 1987 Nissan Pickup

1 Answer

My 2003 Toyota Previa (diesel, with ABS) brake warning light on dashboard lights on after pressing brake pedal a couple of times and when it lights off pedal goes slowly all the way down to the floor. In...


Sounds like there is a fault with the vacuum pump not generating enough vacuum for the brake booster assist, or a leaking vacuum hose. Try pinching off all the vacuum hoses to see if the problem goes away. Could also be a leak in the brake vacuum booster itself

Oct 11, 2010 | 1996 Toyota Previa

2 Answers

Have an '88 corolla sedan (manual), after brakes used in quick succession, brake pedal looses all assistance and pedal goes hard, resulting in poor brakes...any ideas


this is probably normal. your power brake booster operates by storing engine vacuum to be used later to assist the brakes. when you pump the pedal repeatedly in a short period, the stored vacuum gets used up and it does not have sufficient time to build up the vacuum needed to effectively assist with braking. it generally takes a few seconds to build up sufficient vacuum from when you let off the brake pedal to when you press it again. however, brake boosters can fail over time (it's not uncommon, but it does happen), so if this is a new development for this vehicle, you may need to replace the brake booster or check the vacuum line and the check-valve between it and the engine

Sep 29, 2009 | 1987 Toyota Corolla 2 Door

1 Answer

Fiat Uno Pacer - Brake Booster not assist braking


it could be that the master cylinder is bad or the brake booster is bad also check the vacum hose going to the brake booster if it has a hole in it it will lose pressure and make the engine lose rpms

Aug 16, 2009 | 2006 Fiat 124

2 Answers

Power brakes not working


No such thing as vacuum lines to the master cylinder. You do have a vacuum line on the brake booster (power assist). When you step on the pedal do you hear a whoosing sound down by your pedal. This is a leaking Booster. Needs replacement.

When you step on the brake does the engine rpm change. This is a leaking check valve (one way air valve).

Jul 17, 2009 | 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

2 Answers

1998 chevy s10- brake pedal goes to the floor- just changed master cylinder, brake booster, and bled brake lines- did not help


Ok the BRAKE BOOSTER is ONLY there to give you pwer assisted, otherwise NO POWER BRAKES. ( not anything to do with the low brake pedal ) Hopefully the junkyard master cylinder was in better shape than your original. AS far a bleedinda system, heres what I do. First with a1998 vehicle, I would go to ALL 4 wheels , OPEN & CLOSE slightly each bleeder to insure none of them are FROZEN, and they do freeze shut ENSUE THE MASTER CYLINDER IS FULL and CLOSED Now with an assistant sitting in the drivers seat, ready to pump the brakes, and ABLE TO HEAR YOU. Go to the furthest wheel from the master which would be the R/R. DONT touch anything yet. Tell the asst too slowly pump the brake pedal till it gets hard, and then HOLD THE PEDAL DOWN ( and dont let up on it until the pedal drops. If the ast lets up before the bleeder is closed you **** in air.Repeat at each wheel til the pedal stays hard. Hope this helps

Apr 12, 2009 | 1988 Chevrolet C1500

3 Answers

1994 ford explorer will not stop, I have replaced the brake pads,


My vote would be the Master Cylinder.
I had a truck sit for 4 years. After getting running again, it did the same thing you're describing. No brakes. I ended up replacing the Master Cylinder to fix the problem. Just make sure you bleed the system real good.

Mar 25, 2009 | 1994 Ford Explorer Limited

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