anti lock break problem

[nigel lincoln]

hi all wonder if any one has had problems with the anti lock breaks my nsx has the first model breaks and although i have had the speed sensor changed and the pump refurbished the pump keeps running continuously building up the pressure has anyone experienced similer probs or knows of anyone who could help thanks.

[britlude]

could be a solenoid valve stuck open , or accumulator is faulty!

the abs system pumps up a sphere with fluid until a pressure switch trips, and when the abs is activated the computer decides which of the 4 wheels needs action, and activates the appropriate solenoid. this momentarily releases a bit of brake pressure on that corner via a solenoid activated 'plunger', and once the solenoid deactivated, the pressure in the sphere reapplies the pressure to the plunger which in turn restores the brake pedal pressure to the caliper. (it makes more sense when you see a diagram!)

if one of the solenoids has a bit of dirt in it, then the pump will keep running as the pressure cannot be built up!

you will see mentioned here and Prime that the ABS has to be 'exercised', this is to stop the plungers seizing, AND moves the fluid about to clear any debris. (basically find a quiet, dusty (or wet) bit of road and apply the brakes enough to get the abs working)


try these...

the solenoid flush first

http://www.nsxcb.co.uk/showthread.php?6018-ALB-fluid-change&highlight=

and my accumulator replacement

http://www.nsxcb.co.uk/showthread.php?8167-ABS-acumulator-replacement&highlight=

[Sudesh]

hi all wonder if any one has had problems with the anti lock breaks my nsx has the first model breaks and although i have had the speed sensor changed and the pump refurbished the pump keeps running continuously building up the pressure has anyone experienced similer probs or knows of anyone who could help thanks.

Hi and welcome to the club!

What year/model is you car? There was 2 types of ABS on earlier cars.

It's a really old dated system, you could remove it and put a brick in there, and you would have as good a system lol

Do you work on the car yourself? If not, then I would give Kaz a call or send him an email, and he will give you the run down on the setup and what could possibly be at fault. Not sure on you location, but maybe it would be even worth while booking it in with him for a check on the abs.

The other option is upgrading the ABS to the newer type, It's not a cheap upgrade but is a vast improvement, basically brings you from the 80s era to modern day.

[nigel lincoln]

thanks i have the car serviced at an ex honda agent and he seems to think it is dirt in the brake fluid i dont use the car much its always ok when first get it back but then plays up again .My car is a 1992 model.Where is Kaz based and have you got his number i am in lincoln

[Sudesh]

thanks i have the car serviced at an ex honda agent and he seems to think it is dirt in the brake fluid i dont use the car much its always ok when first get it back but then plays up again .My car is a 1992 model.Where is Kaz based and have you got his number i am in lincoln

Unless someone changed it in the past, You will have the very first generation ABS, should have a yellow tag around the reservoir, but can also be distinguished by looking at the system if you know what to look for.

To be honest, neither first gen or second is great, I certainlly wouldn't want to be relaying on it in an emergency situation, even when its working perfect! Also when the system is cleaned out and any know problems repaired, it's still a system that needs to be exercised regularly.

You can contact Kaz through his blog section, or I can PM you his details.

[Sudesh]

Have a read here

http://www.nsxcb.co.uk/blog.php?1811&blogcategoryid=31

And the upgrade abs

http://www.nsxcb.co.uk/blog.php?1811&blogcategoryid=30

I did this conversion for an owner here earlier this year, huge difference!

[NSXGB]

Have a look in the blog section and you will find info on this. You will also find Kaz and you can email him directly through the site.

If you don't use your car much, I think the first thing to do is exercise the solenoids in turn and flush with new fluid. Get your NSX specialist to look here www.danoland.com and you will find a simple guide to do this.