03 f150 brake problems., brakes stop good the petal go to floor.

Asked by Jan 13, 2017 at 12:52 PM about the 2003 Ford F-150 XL Extended Cab SB

Question type: Maintenance & Repair

Repair center said master cyl. replaced 3 times, new pads on rear and bled them out,  lines and calipers work as should , now wants to replace the valve up front on drivers side where the lines run to at 1100 and 50 dollars with no guarantee ,  thoughts please.  can't afford that.

11 Answers

91,935

I think you need another mechanic.

115,025

He didn't bleed then enough, I still think you have allot of air in the system...

Best Answer Mark helpful

Forgot no brake light on and when it goes to the floor it sound like air escaping

21,660

If, when you picked up the car, the brakes were good, then began going to the floor, you're getting air into the system at some point. Check the level of the brake fluid and see if you are loosing any.

Never lost any break fluid even on the original master cyl. the brakes won't right when i picked it up. the service center said he did not know what else to do and i needed to get another opinion on it. he wanted to try a 1100 dollar fix without knowing what wrong.

21,660

The brake pedal going to the floor indicates a few possibilities. There is air in the system. Air is compressible resulting in the pedal going to the floor. The other possibility is that the piston inside the master cylinder is allowing brake fluid to pass by the seal when the pedal is pushed. This happening on more than one new cylinder is remote. Question: Each time you received the vehicle back from the service center, was the brake pedal acting as it should? Or was it "to the floor" right out of the center?

21,660

There is another remote possibility. When a master cylinder is removed you will see a short shaft sticking out from the booster with a screw inserted into the end. This is an adjustment for the travel of the pedal prior to the piston being pushed and applying pressure to the brake system. If this screw got turned inward (somehow), making the distance from the head of the screw further away from the piston, then the pedal would have to be travel further before contact was made with the piston and applying pressure to the system.

1 of 1 people found this helpful.

AS i stated before the brakes stop the truck fine .it is when it is stopped that the brakes start to ease all the way to the floor. you can let the brake petal back up and it holds a few seconds then ease to floo r again.

This is the reason i took it to start with.

21,660

OK, the pedal holds, but slowly goes to the floor. Here are two possibilities. There is an internal leak within the master cylinder. There are two sets of seals on the piston. When pushed the fluid stops the vehicle but the fluid is being pushed past the seal backward toward the booster. Since the master cylinder has been changed this could be the problem, but the original problem is why you brought it to the shop in the first place, right? If the master cylinder has been changed more than once I doubt this is the problem. Second. One of the seals is bad within a caliper. Since the seals suppose to hold hydraulic pressure, it will hold in the fluid, but it maybe sucking air when the pedal is released. Try bleeding your own brakes. If there is air in the system at any wheel check all hoses for cracks. This is going to be a process of elimination one wheel at a time working back to the master cylinder.

Needs a HCM . Hydraulic Control module . All so know as ABS Module . It has a internal leak.

Your Answer

F-150

Looking for a Used F-150 in your area?

CarGurus has 8,974 nationwide F-150 listings starting at $1,995.

ZIP:

Ford F-150 Experts

  • #1
    OJ
    Reputation
    9,730
  • #2
    dandyoun
    Reputation
    4,660
  • #3
    tennisshoes
    Reputation
    3,370
View All

Related Models For Sale

Used Chevrolet Silverado 1500
186 Great Deals out of 10,544 listings starting at $2,230
Used GMC Sierra 1500
244 Great Deals out of 10,865 listings starting at $1,495
Used Ford F-250 Super Duty
25 Great Deals out of 650 listings starting at $1,790
Used Toyota Tundra
33 Great Deals out of 1,395 listings starting at $5,871
Used Dodge Ram 1500
45 Great Deals out of 454 listings starting at $3,488
Used Toyota Tacoma
27 Great Deals out of 1,218 listings starting at $4,444
Used Ford Mustang
5 Great Deals out of 1,035 listings starting at $3,995
Used Ford F-350 Super Duty
29 Great Deals out of 1,106 listings starting at $2,795
Used Chevrolet Colorado
34 Great Deals out of 2,192 listings starting at $1,999
Used Nissan Titan
33 Great Deals out of 526 listings starting at $2,322
Used Chevrolet Tahoe
5 Great Deals out of 812 listings starting at $4,200
Used Ford Explorer
36 Great Deals out of 1,539 listings starting at $5,000
Used Chevrolet Silverado 2500HD
23 Great Deals out of 1,272 listings starting at $4,995

Used Cars For Sale

2018 Ford F-150 For Sale
8 Great Deals out of 3,654 listings starting at $30,799
2017 Ford F-150 For Sale
60 Great Deals out of 1,311 listings starting at $24,995
2016 Ford F-150 For Sale
88 Great Deals out of 897 listings starting at $22,900
2015 Ford F-150 For Sale
161 Great Deals out of 780 listings starting at $19,995
2014 Ford F-150 For Sale
99 Great Deals out of 566 listings starting at $12,900

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use.