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What could be causing weak brakes on a 1977 Ford F-350 one ton truck I have changed master cylinder twice brake booster 4 times replaced brakes calipers and brake shoes replaced brake hoses help?
Wiki User
∙ 15y ago
Try checking the vacuum hose from the booster to the intake manifold for cracks (ie. leaks). A can of carb cleaner lightly misted over the hose if there is a leak/crack will make the engine idle higher(Warning! Do while the engine is still fairly cool!). The same goes for the connection at the intake manifold itself. Also if the engine is underperforming (ie. running badly) this will also produce weak brakes (too little vacuum). And finally, if the engine idle is set too high it will also produce weak brakes(too little vacuum).
Wiki User
∙ 15y ago
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What is wrong if the pedal is almost fully depressed before it starts to stop a 1992 Prelude if the master cylinder is OK calipers bled front calipers replaced and there is no leaks or air in the line?
check linkage down near the pedals..there might be some excess play that is causing the problem
Why don't rear calipers release on 93 probe gt?
The Calipers May Be Bad; Also The Brake Hoses Could Be Bad. On The Inside This Will Restrict The Flow Of Brake Fluid Back Into The Master Cylinder Causing The Caliper To Stay On. If You Replace The Calipers, Replace The Hoses Also.
How do you unfreeze car brakes?
Check the calipers on the car to see which one is frozen. Most likely you have a stuck wheel caliper that is causing the frozen problem and will have to be replaced.
What is causing the hissing sound when you step on the brakes?
Sounds like it could be a vacuum leak at the power brake booster Check the lines to booster and the check valve at the booster Could be a defective brake booster also
In regards to a 1995 Ford Falcon xr6 what does it mean when your brake pedal has gone hard and you need to apply a fair bit of pressure to engage the brakes?
Id check the vacuum booster behind the brake master cylinder. I have seen cases of boosters on fords cracking causing the booster not to work properly. Resulting in a hard pedal and hard to pull up the car. Also the hose to the booster and the check valve where the hose connects to the booster.
Why does your 1999 Ford Crown Victoria have a slight Vacuum sound just when accelerator is pushed?
check the two nuts that hold the master cylinder to your brake booster, sometimes they come loose causing that sound your hearing
What causes the brakes to keep locking up on my 1997 geo tracker even after I have had new brakescalipers and rotors put on?
It is possible the rubber lines at the calipers are collapsing causing a suction which will not allow the brakes to release. might want to check that. Had same issue replaced lines and calipers wheel bearing and found it to be an abs issue the pressure is not releasing
How do you know when the calipers need to be changed?
They Seldom Go Bad. Inspect For Leakage And Sticking. If Yours Stuck Replace It, And The Brake Hose Also. One Reason We Have Trouble With Calipers Is Not The Caliper But The Brake Hose. The Hose Will Rot On The Inside Not Allowing The Brake Fluid To Flow Back Into The Master Cylinder There For Causing Calipers To Stick. If Yours Isn`t Leaking It Should Be OK. Be Sure To Inspect The Brake Hoses, If They Appear Bad Replace Them. GOOD LUCK
What would cause breaks not to work on a Ford Pickup truck?
The brake lines are rusted out causing a loss of pressure/or leak. The master brake cylinder is not working anymore, the brake booster is not holding vacuum, the Brake calipers may be seized, the brake hoses are old from age and are ballooning up - all these things would be contributing factors to the brakes "not working". Brakes don't "break" they just wear out and things need replaced. Its the nature of a machine that has thousands upon thousands of parts that all have to work together at the same time in the right way. Keep up on your vehicles and they won't let you down when you need them.
We just replaced our brake pads yesterday. Today we noticed brake fluid leaking from the left front side. What is causing this?
Expanding the calipers (when you put in new brake pads) can cause the master cylinder reservoir to overflow. Before attempting to perform repairs, make certain it isn't simply leaking out of the master cylinder reservoir. HOWEVER... If it's leaking at the left front wheel, you'll probably need to replace the caliper. Sometimes a hydraulic cylinder, such as the caliper cylinder, can become pitted and when the rubber seal of the piston crosses the pitted surface it can leak brake fluid. Simple answer, find out where it's leaking, it may be nothing, it may be something to repair.
Do your brakes make a noise if you get new calipers?
If new pads came with your new calipers, they can squeal a bit until they 'run in'. If you didn't replace your rotors or have them re-surfaced, they can quickly destroy your new pads causing metal-to-metal grinding.
What causes Suzuki sidekick to stall out when applying the brakes?
It could be a leaking vacuum hose to the power brake booster or the membrane in the booster could have a hole. When the brakes are applied, the booster is opened to the engine vacuum via the hose. The vacuum leak would then increase, causing the engine to stall.
