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1986 F150 and my brakes are wonky. Lately i come to a stop

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and i swear the pedal...
1986 F150 and my brakes are wonky. Lately i come to a stop and i swear the pedal goes to the floor. I also hear screeching noises when stopping also, I'm guessing there is more then one issue here.
Submitted: 1 year ago.Category: Ford
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Answered in 4 minutes by:
8/1/2016
Ford Mechanic: David Craig, Auto Mechanic replied 1 year ago
David Craig
David Craig, Auto Mechanic
Category: Ford
Satisfied Customers: 4,533
Experience: owner/mechanic at 3D Automotive
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Hi Im David. your brakes are what??? if the pedal goes close to the floor and you hear a screeching noise, chances are you need new brakes and rotors.

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Customer reply replied 1 year ago
ok but there could be nothing else wrong, i have been told to check a "break booster" and other things but i don't know where to go from here. I can visually check the pads and rotors but i want to have a full game plan as what are all the possibilities and how to check them. thanks again!
Ford Mechanic: David Craig, Auto Mechanic replied 1 year ago

check the pads and rotors. then depending on their condition we will go from there with a game plan

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Ford Mechanic: David Craig, Auto Mechanic replied 1 year ago

any update?

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Ford Mechanic: David Craig, Auto Mechanic replied 1 year ago

hello???

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Customer reply replied 1 year ago
no update. i will probably be working on it tomorrow.
Ford Mechanic: David Craig, Auto Mechanic replied 1 year ago

ok

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Customer reply replied 1 year ago
ok so the rear brakes aren't working at all- i have jacked it up and the emergency brake does nothing, and pressing the brake pedal does nothing to stop either rear tire. the front brakes are working fine. so, what do i need to fix here?
Ford Mechanic: David Craig, Auto Mechanic replied 1 year ago

ok. look at the brake fluid reservoir, if its a 2 chamber one, make sure both are totally full then we can go further

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Customer reply replied 1 year ago
both are completely full
Ford Mechanic: David Craig, Auto Mechanic replied 1 year ago

ok. break open the bleeders on both rear wheels, pump the pedal see if anything comes out on either one

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Ford Mechanic: David Craig, Auto Mechanic replied 1 year ago

if not then we might be looking at a proportioning valve issue

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Customer reply replied 1 year ago
ya i do not see any fluid out either valve.
Ford Mechanic: David Craig, Auto Mechanic replied 1 year ago

no leaks? then un do the rear lines at the proportioning valve and see if fluid is getting through it

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Customer reply replied 1 year ago
there is fluid in this thing
Ford Mechanic: David Craig, Auto Mechanic replied 1 year ago

is it getting through when the pedal is pressed?

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Customer reply replied 1 year ago
seems like it
Ford Mechanic: David Craig, Auto Mechanic replied 1 year ago

is it a decent stream of fluid?

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Ford Mechanic: David Craig, Auto Mechanic replied 1 year ago

look undr neath the vehicle, follow the lines back to see if anything is kinked.

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Customer reply replied 1 year ago
nope
Ford Mechanic: David Craig, Auto Mechanic replied 1 year ago

are there drums or rotors on the back...guess i should have asked that a while ago.

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Ford Mechanic: David Craig, Auto Mechanic replied 1 year ago

my guess since its a 86 is drums

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Customer reply replied 1 year ago
drums
Ford Mechanic: David Craig, Auto Mechanic replied 1 year ago

ok lets see if we can get fluid to the back by bleeding the brakes. do you have someone who can pump the brakes while you open the bleeders?

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Ford Mechanic: David Craig, Auto Mechanic replied 1 year ago

it is very possible of have air in the system. if its lots of air it will take a few times bleeding them before you see any signs of fluid. if the fluid is coming through the proportioning valve ports for the rear brakes and there are no kinks in the lines or hoses, its either air or both bleeders are blocked or both wheel cylinders are bad. thats it.

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