Question about 1987 Ford Mustang

1 Answer

Lost cruise control after replacing brake booster &master cylinder

Posted by on

1 Answer

  • Level 2:

    An expert who has achieved level 2 by getting 100 points

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

    Novelist:

    An expert who has written 50 answers of more than 400 characters.

  • Expert
  • 176 Answers

And what type of vehicle is that? Surely, in ur replacement of a booster and master cylinder you could have accidentally pinched a wire leading to the cruise control. Trace and check carefully if the booster is making contact with any cables or wires around the vicinity of the booster. If you can't find anything wrong with the wiring, then check that the tailshaft still have a set of magnets strapped or attached with to it. The magnets are usually seen by looking under the car, closest to the gearbox. There is also the pick-up coil close to the magnets. Check if the pick-up coil or the magnets are not damaged of lost. Usually Magnets come apart if the tailshaft revs higher than the revolution it can take, such as when coasting downhill at more than 100 mph. Mine did just that. I coasted my Valiant down a mountainside road and when I was on flat road I re-activated the cruise control and.. it was not working. Then I traced and checked the problem underneath the car and found that the magnets were gone.
So, check if you've pinched a wire while you had installed the booster.

Posted on Oct 06, 2009

1 Suggested Answer

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

Add Your Answer

Uploading: 0%

my-video-file.mp4

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

×

Loading...
Loading...

Related Questions:

1 Answer

While driving hit resume cruise control and the car speed up to 100 and brakes would not work. Had to shut engine off in middle of freeway, what could it be?


Could be a faulty cruise control servo activator. The power to move the cruise control Actuator is most likely coming from the Brake power hydraulic booster vacuum pipe and if the cruise control vacuum servo is failing and leaking in air you lose the brakes power hydraulics.
check the vacuum pipe coming off the power booster brake master cylinder vacuum pipe you may find a tee connector in the vacuum main pipe and follow it to see where it goes to. Could be a break in the cruise control vacuum hose but if it is only happening when the cruise control is activated a fault or leak in the cruise control servo device is the main suspect. Which you should find at the other end of the cruise control vacuum hose.

Jan 31, 2016 | 2004 Oldsmobile Alero

1 Answer

2006 toyota tundra sr5 crew cab 4x4 losing brake fluid in the booster ? What do I replace there seems to be some kinda control valve maybe for the abs in between the master cyclinder and the brake booster...


Take Off Nuts That Hold Master Cylinder To Booster. Pull Master Cylinder Away From Booster--Do Not Damage Lines--Feel With Finger At Rear Of Master Cylinder For Fluid--If Found Replace Master Cylinder And Booster With Total Unit Combo For Better Warranty. DO NOT FOOT BLEED--Pressure Bleed Or Gravity Bleed Only.

Feb 19, 2015 | Toyota Cars & Trucks

1 Answer

How to tell is the brake booster is bad in a 1986 dodge D100


This is a standard Vacuum operated brake booster.. If you are having fluid leaking at the rod that attaches the brake pedal to the booster it is a bad Master Cylinder. The Brake fluid will eventually destroy the diaphram in the booster if it hasn't already. . Replace or rebuild the Master Cylinder and wash the brake fluid out of the booster. When the booster goes bad the brake pedal will become very hard to push.. because you will have lost "boost" This is not really a hard job. If fluid id leaking somewhere else.it should be very easy to spot.. Brake fluid looks like oil leaking..

May 13, 2014 | 2005 Cadillac STS

1 Answer

Can a vacuum leak from a brake booster cause squeaking noise


It's the master cylinder that needed replacing. Check if the booster will still be good after draining it.

Mar 03, 2013 | 2005 Toyota Corolla

1 Answer

Cruise control


I would look at the brake pressure on the master cylinder you replaced. make sure all connectors are OK and don't have any fluid in them.

Nov 22, 2012 | 2003 Ford Expedition

2 Answers

Toyota 4 runner brake booster noise


if you can see brake fluid around the booster then yes it is most definitely not right, but sometimes these can fail without any fluid noticable, the visible fluid could mean that the brake master cylinder is failing & this will have an adverse affect on the booster power & performance, check your brake master cylinder first as this is a much simpler & easier repair than the brake booster & can be done at home on a flat drive or or street even, a Haynes manual is invaluable for the home mechanic & i recommend you get one as soon as you can as this will help you diagnose the problems with your vehicle before going to a mechanic/garage, if it is the brake booster at fault then i suggest you go to your local scrapper/breakers yard armed with tools & the Haynes/Chilton's Manual (Depending on which side of the pond you are from) & remove the brake booster from a now deceased Toyota 4Runner & remove the brake booster & master cylinder in one should only cost you a few Quid or Bucks & replace the part once your vehicle is back at home, once the parts have been replaced the brake system will need to be bled so that there is no air in the brake lines, this can be easily done with two people at home, Jack up one corner, remove that wheel & then just crack off the bleed nipple of the brake line Putting a bit of clear hose over the nipple to catch the excess brake fluid in a jug etc & have a friend push down slowly on the pedal, when only fluid comes out with no air then the system is bled for that wheel, Check the level in the brake master cylinder & repeat the process for the other 3 corners/wheels Once done your brake pedal should fell firm & Not spongy, If you get a spongy feeling when braking after this then there is still air in the brake lines & the system needs to be bled again, of course if you have done it right then your brakes should feel firm underfoot. Please don't forget to rate me, regards, Paul.

Sep 21, 2012 | Toyota 4Runner Cars & Trucks

1 Answer

I have 1996 ford thunderbird lx 4.6 liter v8 engine and how do i remove power booster brake from the firewall!


Pull the vacuum hose off the booster. Disconnect the brake lines from the master cylinder. Remove the master cylinder. Remove the windshield wiper motor if it's in the way. Inside the car, disconnect the stoplight switch connector. Slide the stop lamp switch off the brake pedal just far enough for the outer arm to clear the pin. If you have cruise control, remove the speed amplifier. Remove the booster attaching bolts/nuts. Slide the booster pushrod, bushing and the nylon washer off the brake pedal pin. In the engine compartment, pull the booster forward and rotate it until it is free. Good luck!

Aug 24, 2010 | 1996 Ford Thunderbird LX

1 Answer

Install new brake pads and rotors all 4 wheels. Replaced front 2 calipers. Bled brakes. New clean fluid coming out. pedal is still soft and goes to floor. 200 Seebring.


Are you losing any Brake Fluid? Is it visible anywhere at the four wheels? Is it visible anywhere else?
The Master Cylinder may be defective. When you bled the Brakes did you maintain proper Brake Fluid Level in the Master Cylinder? If you didn't: and air entered into the Master Cylinder there maybe air within in the system in the Master Cylinder. You can bleed the Master Cylinder by removing the brake lines, adding more fluid, pumping the brakes, bleeding the air out of the system.
Are you losing Brake Fluid and can't find a noticeable leak? Then there is a good posibility that the rear seal in the Master Cylinder is leaking and the Fluid is going into the Brake Booster - which is the large wheel shaped drum located on the fire wall. In this case both the Brake Booster and the Master Cylinder will have to be removed and replaced. The Booster contains seals that Brake Fluid is very caustic to and will ruin these seals- causing future failures.
If no Brake Fluid is lost, no leak found: Check the Brake Booster Vacuum Advance. This should be connected to the outside of the Booster, attached to a hose, with the hose going to the engine. Check to see if this is working properly. Replace if needed.

Dec 31, 2009 | 2002 Chrysler Sebring

1 Answer

Leaking brake fluid + Faulty cruise control


If you see fluid at the rear of the master where it attaches to the power booster then the cylinder itself is leaking. It's not often that the container leaks.
The hissing noise is very likely coming from the power booster. This must be replaced. If cruise has a vacuum hose that connects to hose to booster it's possible that vacuum loss at booster is causing the cruise problem.If you are going to do the booster, have a good tech take a look at it first. they are expensive and you don't want to change it on my advice alone...I'm not there and can't hear it!

Mar 24, 2009 | 2004 Jeep Grand Cherokee

Not finding what you are looking for?
Cars & Trucks Logo

223 people viewed this question

Ask a Question

Usually answered in minutes!

Top Ford Experts

yadayada
yadayada

Level 3 Expert

75197 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22095 Answers

fordexpert

Level 3 Expert

5481 Answers

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

Answer questions

Manuals & User Guides

Loading...