why does my Ford F-150 14th Generation (2021-2024) brake pedal feel spongy

Solution

1. Preparation

• Gather necessary tools and parts.
• Ensure the vehicle is parked on a flat surface and secure it with wheel chocks.
• Disconnect the battery for safety before working on the braking system.

2. Inspect and Replace Brake Fluid

• Sub-steps:
  1. Remove the cap from the master cylinder reservoir.
  2. Use a turkey baster or siphon to remove old brake fluid.
  3. Refill the reservoir with fresh brake fluid (DOT 3 or DOT 4, as specified in the owner's manual).
  4. Bleed the brake system to remove air bubbles:
     • Begin with the wheel farthest from the master cylinder (usually the rear passenger side).
     • Attach a clear tube to the bleeder screw and submerge the other end in a container filled with brake fluid.
     • Have an assistant pump the brake pedal several times and hold it down while you open the bleeder screw. Close the screw while the pedal is still down, then allow the assistant to release the pedal. Repeat until clear fluid is seen without bubbles.
     • Move to the next wheel and repeat until all wheels are bled.

3. Inspect and Replace Brake Lines or Hoses

• Sub-steps:
  1. Visually inspect all brake lines and hoses for cracks, bulges, or leaks.
  2. If any damage is found, replace the affected brake line or hose:
     • Use a line wrench to remove the damaged line from the brake caliper and master cylinder.
     • Install the new line, ensuring all connections are tight.
     • Bleed the brake system again after replacement.

4. Inspect and Replace Brake Pads and Rotors (if necessary)

• Sub-steps:
  1. Remove the wheel to access the brake components.
  2. Check the thickness of brake pads and condition of rotors:
     • If pads are worn below the minimum thickness, replace them.
     • If rotors are scored or below the minimum thickness, replace or resurface them.
  3. Install new pads and rotors, following the manufacturer's specifications for torque values.

5. Check Brake Booster and Master Cylinder

• Sub-steps:
  1. Inspect the brake booster for any signs of damage or vacuum leaks.
  2. If the master cylinder is found to be leaking or failing, replace it:
     • Disconnect brake lines and remove the master cylinder from the brake booster.
     • Install the new master cylinder and reconnect the brake lines.
     • Bleed the brake system to remove air from the new master cylinder.