Having problems with your 1994 Toyota Previa ?

Spongy brakes,pedal wont go down more than a couple of inches

\015 Hi,drove my previa yesterday and all was well,tried to take car out couple of hours later but the brake pedal wouldn't go down and can hear air as i push.Checked the red dipstick in the engine (not sure if this is the brake fluid) level is fine,any suggestions !!! Abby\015 Posted / edited by AnonymousUser on : 12-11-2018

Answers :

ABBY LOOKK UNDER THE HOOD ON THE DRIVERS SIDE OF THE CAR AND YOU WILL SEE A SMALL PLASTIC TUB WITH A TOP ON IT, THIS IS YOUR BRAKE FLUID MASTER CYLINDERCHECK ON THE OUTSIDE OF THE SMALL TUB AND SEE IF THE FLUID INSIDE IS LEVEL WITH THE FULL MARK ON THE OUTSIDE. IF SO AND YOU STILL HEAR THE AIR NOISE YOU MAY HAVE A LEAKING DIAPHRAM IN THE BRAKE BOOSTER. HERES HOW YOU CHECK. STEP ON THE BRAKE PEDAL WITH THE ENGINE RUNNING, NOW TURN OFF THE ENGINE AND STEP ON THE BRAKE PEDAL ABOUT 2-3 TIMES AND SEE IF THE PEDAL GETS ANY HARDER TO PUSH IF NOT YOU DEFINATELY HAVE A BRAKE BOOSTER PROBLEM. THE BRAKE BOOSTER IS THE ROUND UNIT RIGHT BEHIND THE MASTER CYLINDER KINDA RESEMBLES THE BOTTOM OF A PLATE, THERE SHOULD BE 1 OR 2 BLACK HOSES THAT PLUG INTO IT MAKE SURE THE HOSE OR HOSES DO NOT HAVE ANY RIPS, HOLES, OR TEARS IN THEM AND MAKE SURE THEY ARE CONNECTED TO THE BRAKE BOOSTER. LAST BUT NOT LEAST PUMP THE BRAKE PEDAL 2 OR 3 TIMES WITH THE ENGINE RUNNING AND THE CAR PARKED AND THEN GET OUT AND LOOK UNDER THE CAR TO MAKE SURE THERE IS NO FLUID ON THE GROUND.
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Don't look at the red dipstick. This is for the engine oil level or gearcase oil level...
\015\012In the engine room, in front of the drivers place, you'll find a plastic 'can' with (usually) a black or yellow screwed cap.
\015\012This is the brake fluid can. Clean the top and around the cap. Pour brake fluid to the 'max' mark.
\015\012CAUTION: brake fluid is NOT engine oil. Brake fluid is aggressive for paint, clothes, skin!
Repair Help & Product Troubleshooting for 1994 Toyota Previa

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