How JustAnswer Works:

  • Ask an Expert
    Experts are full of valuable knowledge and are ready to help with any question. Credentials confirmed by a Fortune 500 verification firm.
  • Get a Professional Answer
    Via email, text message, or notification as you wait on our site.
    Ask follow up questions if you need to.
  • 100% Satisfaction Guarantee
    Rate the answer you receive.

Ask Steve Your Own Question

Steve
Steve, Ford Technician
Category: Ford
Satisfied Customers: 6841
Experience:  25 years working for Ford dealer. Ford Master tech.
43460220
Type Your Ford Question Here...
Steve is online now
A new question is answered every 9 seconds

RA-hg

Customer Question

I have a 1991 ford Aerostar. The abs light and brake light come on while driving. The car surges while driving and off and on and the car shakes real hard at times while driving, like the abs system is coming on and thinks the brakes are locking up. We are out of town and want to make sure we make it 800 miles home safely. Just had master cylinders replaced in rear.
Submitted: 1 year ago.
Category: Ford
Expert:  Steve replied 1 year ago.

Steve :

Welcome and thanks for your question. My name isXXXXX will do whatever I can to answer your questions!

Steve :

If the brake light and the abs light are coming on at the same time then the master cylinder is low on brake fluid.

JACUSTOMER-z5krrxkd- : So what needs to be done to fix it? And why is the abs system trying to come on while driving/ causing a lot of shaking in car and slight surging while driving?
Steve :

Does it shake when coming to a stop?

JACUSTOMER-z5krrxkd- : No while accelerating and just coasting. It comes and goes. And smelling burning a burning fluid smell.
Steve :

That does not sound brake related, that sounds like you have a misfire in the engine. Possibly you have some bad spark plugs and spark plug wires.

JACUSTOMER-z5krrxkd- : Just had it in to Firestone this am, I don't think they know what they are talking about. It won't have problems after the car has been off and lights will be off for the first 5 minutes of driving, then it starts acting up. P
Steve :

I would first check the brakes master cylinder for being low on brake fluid to repair the light. If you engine is shaking on acceleration and coasting that is a engine misfire.

JACUSTOMER-z5krrxkd- : That would cause the rear end of the car to shake. Engine is running good. And smell burning fluids? And why brake lights on if its spark plugs?
Steve :

The shaking is coming from the rear of the van?

JACUSTOMER-z5krrxkd- : Yes, it is. Had drive shaft checked for looseness, and u bolts are ok.
JACUSTOMER-z5krrxkd- : Firestone suggested that abs pump is going out but before I spend that kinda money I want to make sure. I read something about a seal in the abs pump? Or can the fuse be pulled for the abs system to see if it fixes the problem?
Steve :

You have two separate concerns. One is the light. The light is coming on because the master cylinder is low on fluid. The second concern is the vibration from the rear. This is usually caused by a drive shaft imbalance, bad u- joint. Could be a bad tire in the rear.

JACUSTOMER-z5krrxkd- : We drove 800 miles with no problems with the shaking. Shaking did not occur until I had master cylinders replaced and new shoes.
Steve :

If it started right after they put the shoes on then they probably messed something up replacing the shoes and the wheel cylinders.

Steve :

I would have there work double checked by someone.

JACUSTOMER-z5krrxkd- : How do we check the brake fluid in the master cylinder?
Steve :

You open the hood of the van and on the drivers side in the back corner is a master cylinder. It is a clear bottle with marks on it for full and low see if it is full.

JACUSTOMER-z5krrxkd- : The brake fluid container? Ok going to check now. Should car be running or not?
Steve :

Does not matter, Ill send you a pics so you know what to look for.

JACUSTOMER-z5krrxkd- : Brake fluid full to top. It seems as if the antilock brake system is coming on while driving.
Steve :

The antilock brakes do not activate unless you step on them. If it is activating or vibrating when you are stepping on the brakes and it only started acting up after the rear brakes were done, it is possible the rear brakes are the concern.

Steve :

Let me know i you have any other questions thanks.

Steve :

do you have any other questions on your concern?

JustAnswer in the News:

 
 
 
Ask-a-doc Web sites: If you've got a quick question, you can try to get an answer from sites that say they have various specialists on hand to give quick answers... Justanswer.com.
JustAnswer.com...has seen a spike since October in legal questions from readers about layoffs, unemployment and severance.
Web sites like justanswer.com/legal
...leave nothing to chance.
Traffic on JustAnswer rose 14 percent...and had nearly 400,000 page views in 30 days...inquiries related to stress, high blood pressure, drinking and heart pain jumped 33 percent.
Tory Johnson, GMA Workplace Contributor, discusses work-from-home jobs, such as JustAnswer in which verified Experts answer people’s questions.
I will tell you that...the things you have to go through to be an Expert are quite rigorous.
 
 
 

What Customers are Saying:

 
 
 
  • AlvinC answered a question about my Ford truck that only someone with an in-depth knowledge of his subject would have known what was going on. Rich D USA
< Last | Next >
  • AlvinC answered a question about my Ford truck that only someone with an in-depth knowledge of his subject would have known what was going on. Rich D USA
  • Because of your expertise, you armed me with enough ammunition to win the battle with the dealer. They are installing a fuel filter and fuel pump at no charge to me. Molly USA
  • I needed help with my car on Saturday morning....got a response in 5 minutes, and it was the perfect solution. Thanks again to your service. Jason V. Kirkland, WA
  • I do know, after going though this with JustAnswer, that I can somewhat trust my mechanic but I will always contact you prior to going there. BR New Jersey
  • I would (and have) recommend your site to others I was quite satisfied with the quality of the information received, the professional with whom I interacted, and the quick response time. Thanks, and be sure that I'll be back whenever I need a question answered in a hurry. Stephanie P Elm City, NC
  • used your service this weekend with "Trecers" help. thank you ,thank you, thank you. replaced an A/C fan motor. Local Auto Zone had part. $15.00 "tracer" fee and $40.00 for parts, I saved several hundreds of dollers at a shop. i will recommend you and use you in the future. David L. Richmond, TX
  • 9 dollars, 2 hours of my time, and I drove away. Your diagnosis was right on the mark. Thank you so much. Phil Marysville, CA
 
 
 

Meet The Experts:

 
 
 
  • Ron

    ASE Certified Technician

    Satisfied Customers:

    20942
    23 years with Ford specializing in drivability and electrical and AC. Ford certs and ASE Certs
< Last | Next >
  • http://ww2.justanswer.com/uploads/FO/fordguy4u/2011-12-17_222940_HPIM1257.64x64.JPG Ron's Avatar

    Ron

    ASE Certified Technician

    Satisfied Customers:

    20942
    23 years with Ford specializing in drivability and electrical and AC. Ford certs and ASE Certs
  • http://ww2.justanswer.com/uploads/MU/muddyford/2012-6-13_1204_1.64x64.png Chris (aka- Moose)'s Avatar

    Chris (aka- Moose)

    Ford Technician

    Satisfied Customers:

    22382
    16 years experience with Ford.
  • http://ww2.justanswer.com/uploads/JM/jmcdo28/2012-2-23_01655_resized.64x64.jpg John Mc's Avatar

    John Mc

    Ford Technician

    Satisfied Customers:

    5493
    19 years Ford Lincoln Mercury experience
  • http://ww2.justanswer.com/uploads/wmarti7/2009-4-18_04332_Avatar.jpg Chuck's Avatar

    Chuck

    ASE Certified Technician

    Satisfied Customers:

    1684
    33 Years Experience,Ford Senior Master,ASE Master,L1 Advanced Engine Performance
  • http://ww2.justanswer.com/uploads/CR/crzydrvr00/2013-11-3_12123_246347.64x64.jpg Richard's Avatar

    Richard

    ASE Certified Technician

    Satisfied Customers:

    1518
    12 years at a Ford Lincoln/Mercury and Jaguar dealer as a technician and shop foreman.
  • http://ww2.justanswer.com/uploads/BA/baddad1/2014-4-1_23659_avatar.64x64.jpg Mike V.'s Avatar

    Mike V.

    Auto Service Technician

    Satisfied Customers:

    789
    25 years experience on all makes and models, Licensed NYS Inspector.
  • http://ww2.justanswer.com/uploads/lostrider/2009-9-26_23144_php4VNWAA_c1PM1.jpg lostrider's Avatar

    lostrider

    Ford Technician

    Satisfied Customers:

    2940
    ASE Master Technician, Ford Senior Master Technician,Diesel certified, ASE Master, 22 yrs FORD exp.
 
 
 
Chat Now With A Ford Mechanic
Steve
Steve
Ford tech Specializing in electronics
5328 Satisfied Customers
25 years working for Ford dealer. Ford Master tech.