Results 1 to 11 of 11

Thread: Honda weak brakes

This is a forum for discussing cars that are not British. Discuss anything from Mazda to Corvettes or anything in between here.

  1. #1
    Obi Wan
    Join Date
    Jan 2011
    Location
    stamford, CT
    Posts
    2,167
    Thanks Thanks Given 
    0
    Thanks Thanks Received 
    17
    Thanked in
    17 Posts

    Honda weak brakes

    Our '02 Honda V6 has developed a brake problem. It is almost like it has no power brakes. The pedal is firm and does not pump up but the effort is high. When I get back into the Subaru, I almost go through the windshield. I'll check out the power brake booster tomorrow if its not raining, but other than that, what else could it be before I call the shop.

  2. #2
    Yoda dklawson's Avatar
    Join Date
    Mar 2005
    Location
    Durham, North Carolina, USA
    Posts
    6,133
    Thanks Thanks Given 
    0
    Thanks Thanks Received 
    42
    Thanked in
    39 Posts

    Re: Honda weak brakes

    If it is not the booster itself it could be the vacuum supply to it (hoses, check valve, etc.)
    Doug L.
    '64 Morris Mini Cooper-S 1275
    '67 Triumph GT6 Mk1

  3. #3
    Obi Wan
    Join Date
    Jan 2011
    Location
    stamford, CT
    Posts
    2,167
    Thanks Thanks Given 
    0
    Thanks Thanks Received 
    17
    Thanked in
    17 Posts

    Re: Honda weak brakes

    Booster seems to be ok. Hose in place with no obvious tears and when I start the car with my foot on the pedal, it goes down about an inch which seems to be normal according to what I read online. Pedal does not pump up so no air in lines. Perhaps the linings are getting glazed?

  4. #4
    Yoda dklawson's Avatar
    Join Date
    Mar 2005
    Location
    Durham, North Carolina, USA
    Posts
    6,133
    Thanks Thanks Given 
    0
    Thanks Thanks Received 
    42
    Thanked in
    39 Posts

    Re: Honda weak brakes

    I know you said the servo is OK but what are you basing that on?

    Servos are usually connected to the intake manifold by a heavy, large bore vacuum hose. The systems typically include a check valve so that the vacuum is maintained in the servo. The check valve can be at the servo, in the hose, or at the manifold. (Sorry, I don't know where Honda puts their's). If the check valve has failed you won't have any power assist when stopping and the servo itself will look fine.

    Front brakes do the lion's share of the work. Check your front rotors and pads for anything obviously wrong. Glazed brakes typically develop over time as opposed to the quick change in pedal observed with servo failure.
    Doug L.
    '64 Morris Mini Cooper-S 1275
    '67 Triumph GT6 Mk1

  5. #5
    Yoda waltesefalcon's Avatar
    Join Date
    May 2002
    Location
    Fletcher, Oklahoma
    Posts
    5,468
    Thanks Thanks Given 
    455
    Thanks Thanks Received 
    6
    Thanked in
    6 Posts

    Re: Honda weak brakes

    I think Doug has a good point. Have you tried firing it up with the hose detached from the booster and seeing what kind of brake pedal you get that way? It's a simple test but if your booster is good you should have a considerably different pedal with the booster unhooked. P.S. don't drive it around like that just check it in your driveway.
    Cheers,
    Walter
    52 International L110
    61 International C112
    68 Cadillac Coupe DeVille

  6. #6
    Yoda dklawson's Avatar
    Join Date
    Mar 2005
    Location
    Durham, North Carolina, USA
    Posts
    6,133
    Thanks Thanks Given 
    0
    Thanks Thanks Received 
    42
    Thanked in
    39 Posts

    Re: Honda weak brakes

    ... and don't forget to plug the hose or hole in the intake manifold. Leaving it open without a plug creates a huge vacuum leak.
    Doug L.
    '64 Morris Mini Cooper-S 1275
    '67 Triumph GT6 Mk1

  7. The Following User Says Thank You to dklawson For This Useful Post:

    waltesefalcon  (12-25-2018)

  8. #7
    Obi Wan
    Join Date
    Jan 2011
    Location
    stamford, CT
    Posts
    2,167
    Thanks Thanks Given 
    0
    Thanks Thanks Received 
    17
    Thanked in
    17 Posts

    Re: Honda weak brakes

    If the pedal goes down when you start the car while pushing on the pedal, doesn't that mean that the booster is working properly? That's what happens with the Subaru - the pedal goes 3/4 way to the floor and softens. The Honda pedal only goes down about an inch and softens. The Subaru brakes are the best I've ever used.

  9. #8
    Yoda dklawson's Avatar
    Join Date
    Mar 2005
    Location
    Durham, North Carolina, USA
    Posts
    6,133
    Thanks Thanks Given 
    0
    Thanks Thanks Received 
    42
    Thanked in
    39 Posts

    Re: Honda weak brakes

    I have only test driven Subaru(s). I don't remember their brakes. OTOH, our 2005 Accord would put you through the windshield if you sneezed on the brake pedal.

    Take a read through the article linked below. It may help you determine if the problem is in the servo.

    https://axleaddict.com/auto-repair/B...-Booster-Check
    Doug L.
    '64 Morris Mini Cooper-S 1275
    '67 Triumph GT6 Mk1

  10. #9
    Great Pumpkin NutmegCT's Avatar
    Join Date
    Jul 2004
    Location
    Connecticut USA
    Posts
    11,038
    Blog Entries
    1
    Thanks Thanks Given 
    43
    Thanks Thanks Received 
    98
    Thanked in
    90 Posts

    Re: Honda weak brakes

    Paul - what was the final diagnosis on your Honda brake problem?
    Mac & Phyllis Take a Trip: http://nutmegflyer.com/trip-details-daily-updates/
    History: 1976 MGB, 1959 Triumph TR3A, 1960 Mercedes-Benz 190b, 1958 Rambler American.
    Current: 1953 MG TD27318.

  11. #10
    Obi Wan
    Join Date
    Jan 2011
    Location
    stamford, CT
    Posts
    2,167
    Thanks Thanks Given 
    0
    Thanks Thanks Received 
    17
    Thanked in
    17 Posts

    Re: Honda weak brakes

    No diagnosis yet. I'll have to take it into the shop and have my guy check out the system. But there are other issues. The battery shows 12.50 volts at rest which means it's near the end of its life, the front bumper needs refinishing, the tires need replacement, the auto transmission is getting a bit dodgy starting off and sometimes racing before shifting into a higher gear and the finish needs a good compounding and polishing. On the plus side, the V6 engine is strong, burns no oil and still returns about 25 mpg. Probably the best engine in any car I ever had - and that's a lot of cars. So it comes down to this. Do I sink any more $$ into this or move on. This is wife's car. Probably wind up with something coming off lease. Perhaps another Accord with backup camera. Good safety feature. Some of the other crap like lane keeping assist is just another thing to go wrong and not needed. We're not SUV fans.

  12. #11
    Yoda dklawson's Avatar
    Join Date
    Mar 2005
    Location
    Durham, North Carolina, USA
    Posts
    6,133
    Thanks Thanks Given 
    0
    Thanks Thanks Received 
    42
    Thanked in
    39 Posts

    Re: Honda weak brakes

    Sorry there is no resolution yet but I completely understand. We recently sold our 4-cylinder Accord when it rapidly developed a litany of things needing attention... some of them expensive. Sometimes it is just time to move on.
    Doug L.
    '64 Morris Mini Cooper-S 1275
    '67 Triumph GT6 Mk1

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •