Forum Discussion

Crowe's avatar
Crowe
Explorer
Jul 06, 2016

F150 brake issues continue-AND THE WINNER IS...

It's been a while since I posted but we continue to have brake issues with our 2012 F150. At low mileage the front rotors needed to be replaced. We've had continual problems with the brakes not pressurizing correctly on start-up of the vehicle-brake pedal goes right to the floor until it's pumped a few times. We had the vacuum pump recall done which alleviated the strange noise we were getting but the brakes continue to have the same issue. When the truck is not running the brake pedal doesn't budge at all. My experience on previously owned F150s is there's at least a little bit of play when you depress the pedal upon starting the engine. Thoughts? It's going back in the shop next week and any suggestions on what direction in which to guide Ford would be helpful as the service advisor seems a bit clueless. Thanks.
Tow Vehicles

23 Replies

  • Crowe's avatar
    Crowe
    Explorer
    Jul 14, 2016
    Is the part number listed?

    DL3Z-2005-D Booster 674278
    3M5Z-2L523-AA Bush 121090
    6e5Z-14526-CA Fuse 125968
  • Crowe's avatar
    Crowe
    Explorer
    Jul 13, 2016
    OOOPS! The pump had already been replaced under warranty (I misinterpreted what I was told). They replaced a booster, bushing and a fuse this time. Brakes are currently working the way they should be.

    Mbopp, thanks for digging up the recall. That had already been done, which could explain why the dealer was puzzled.
  • Crowe's avatar
    Crowe
    Explorer
    Jul 13, 2016
    Vacuum pump. Covered under our extended warranty minus the $100 deductible. The extended warranty was given to us as part of the original sale (we'd never normally have one) and it's paid off a couple of times already. Ford has not yet done a recall but there have been numerous issues with these pumps so stay tuned.
  • _40Fan's avatar
    _40Fan
    Explorer
    Jul 10, 2016
    I have replaced more Ford ABS modules/pumps for low pedal problems than I have for them failing electrically. I haven't ran into any newer models yet, but the older ones have black plugs on the side of the unit. Once you pop the plugs off you will need to put something in the hole (I use a piece of 3" long wire) until it bottoms out. Have someone start the engine and press the brake pedal. If the wire moves, the unit is bad.

    These are the pistons that move and allow pressure to drop when ABS is needed, but should stay still under normal braking.
  • SoCalDesertRid1's avatar
    SoCalDesertRid1
    Explorer II
    Jul 07, 2016
    With power brakes, it is normal for the pedal to be hard when the engine isn't running. When the pedal is hard while driving, or any time the engine is running, the problem is usually a bad booster.
  • Crowe's avatar
    Crowe
    Explorer
    Jul 07, 2016
    How is the braking? Does it stop ok or is braking poor? If you pump up the pedal with the engine off and hold pressure on it for a minute, does it sink slowly?

    Stops fine but as stated pedal is like a rock when truck not on.

    Since the OP did not mention any loss of brake fluid I would rule out wheel cylinders, brake lines and hoses leaking..

    Not mentioned because I really don't know. Hubby being the "let's go for the most difficult thing first" engineer type HASN'T LOOKED! :B If I can hobble out to the truck I'll check myself (nursing a bad foot). Usually that would be something I would think of. Hang tight. Now I'm curious.

    Checked the fluid. Mind you I'm about 5'5" so I'm not "short", but seeing into the reservoir was a bit a challenge!

    Fluid is dark yellow and up to the max line.

About Travel Trailer Group

44,056 PostsLatest Activity: Jan 12, 2020