Question about 1999 Ford Expedition

2 Answers

Brake pedal hard and vehicle wont stop. intermittently

Posted by on

2 Answers

  • Level 2:

    An expert who has achieved level 2 by getting 100 points

    MVP:

    An expert that got 5 achievements.

    Governor:

    An expert whose answer got voted for 20 times.

    New Friend:

    An expert that has 1 follower.

  • Expert
  • 168 Answers

Bad power brake booster unit ( check by spraying carb. cleaner at the base for the master cly. and the power brake booster unit, with the motor running if the engine changes speed the unit is bad ) and the or no vacuum to said unit

Posted on Sep 23, 2009

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

    Vice President:

    An expert whose answer got voted for 100 times.

  • Master
  • 299 Answers

Either is is a bad booster (hissing noise) or the vacuum line is disconnected the vacuum line is located on the left side of the vehicle on
on the right side of the booster

Posted on Sep 23, 2009

3 Suggested Answers

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi,
a 6ya expert can help you resolve that issue over the phone in a minute or two.
best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
goodluck!

Posted on Jan 02, 2017

tripletauto
  • 1450 Answers

SOURCE: I have a brand new

if you can tap accelrator and idle lowers it is a problem with cable sticking

Posted on Jan 22, 2009

  • 14036 Answers

SOURCE: 2003 F150 supercrew, 2WD, 4 wheel disc brakes.

COULD BE MASTERCYLINDER. BUT IF BRAKE STAY FIRM SOLID WITH ENGINE OFF BRAKE POWER BOOSTER COULD BE BAD.

Posted on Jul 26, 2011

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

1 Answer

ABS engages without braking


Check all wheel sensors for broken wires, loose connectors or position of sensors in their mounting brackets.

Mar 29, 2017 | Cars & Trucks

1 Answer

Rav4 intermittant hard pedal


If the ABS system were the problem, the ABS warning light should come on.
So I would say the problem is with the vac booster. The booster is between the pedal and the master cylinder. It uses vac to boost the pressure applied to the master cylinder by your foot.
You may have to leave the vehicle with a mechanic to drive until the problem occurs.

Dec 18, 2012 | 2001 Toyota RAV4

1 Answer

When coming to a stop, the brakes work fine until I get almost stopped, then the pedal will push down further and brakes will come on hard, and stop vehicle hard, what could be the problem?


Sounds like your master cylinder is bad on your brake system. If you are stopped in your driveway(not on the street) leave the vehicle in park. Start the car and place your foot on the brake with light pressure and keep this pressure on the pedal. If the pedal continues to drop slowly to the floorboard your master cylinder is leaking past the primary piston in the master cylinder. If this is the case have this repaired immediately. Your brakes could just all of a sudden not be there the next time you apply them when you need to stop.

Apr 05, 2012 | 1995 Buick LeSabre

1 Answer

Brake pedal gets hard when braking, no normal braking


If there is a malfunction in the brake servo assist system, and your assistance is reduced, the brake pedal will become hard and you will need much more pressure on the brake pedal to stop the car.

It is possible that there is a vacuum leak in the brake servo assist system and you are only getting 50% or less assistance when you are applying the brakes.

You need to have the vehicle checked out without delay because if you lose brake assistance entirely it will be very difficult to stop the car.

Dec 22, 2010 | 2007 Toyota Camry

3 Answers

Braking system: 1980 Ford F-100 (doesn't work)


You need to bleed the brake lines.....I can tell you how if need be.

Apr 26, 2009 | 1981 Ford F 100

Not finding what you are looking for?
1999 Ford Expedition Logo

331 people viewed this question

Ask a Question

Usually answered in minutes!

Top Ford Experts

yadayada
yadayada

Level 3 Expert

75822 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22156 Answers

fordexpert

Level 3 Expert

5501 Answers

Are you a Ford Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...