Honda Accord (1990 - 2002) Includes 1997 - 1999 Acura CL

Brakes work fine but get soft when braking hard

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Old Nov 22, 2012 | 10:06 AM
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steve55super77's Avatar
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Icon2 Brakes work fine but get soft when braking hard

I tried to search for this but had no luck.
My question pertains to a '98 Accord (EX I believe, it is fully loaded with V6 and 4 wheel disc brakes but I'm not 100% sure). The car had sat for a year or so when I got it and a rear caliper was sticking. I put 2 new calipers and rotors on it and it stops like a dream now but if I am almost stopped and hit the pedal hard (nothing excessive) it will get soft and pulsate as if the abs is engaging even on perfectly dry pavement. Any input would be appreciated, thanks!
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Old Nov 22, 2012 | 09:43 PM
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Default Re: Brakes work fine but get soft when braking hard

You bleed the system correctly? Theres a way it has to be done with ABS, also did you pump the brakes a few hundred times after replacing the claipers to seat the pads?
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Old Nov 23, 2012 | 05:58 AM
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Default Re: Brakes work fine but get soft when braking hard

If you and have bled all four brakes properly try bleeding the brake master cylinder. Look it up to do it properly and be sure to not let any air in.
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Old Nov 23, 2012 | 12:13 PM
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Default Re: Brakes work fine but get soft when braking hard

I would say master cylinder but it has abs so I would start at the pump.
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Old Nov 24, 2012 | 01:27 AM
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Default Re: Brakes work fine but get soft when braking hard

Try the break master cylinder. Fixed my similar problem
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Old Nov 24, 2012 | 01:33 AM
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Default Re: Brakes work fine but get soft when braking hard

Try the break master cylinder. Fixed my similar problem
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Old Nov 24, 2012 | 06:11 AM
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Default Re: Brakes work fine but get soft when braking hard

Drain and replace all the fluid with Valvoline synthetic fluid.
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Old Nov 24, 2012 | 09:25 AM
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Default Re: Brakes work fine but get soft when braking hard

Also look at the abs fluid resovouir, it is a seperate resevouir behind the driver side headlight mine was low on fluid, had no idea
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Old Nov 24, 2012 | 11:22 AM
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Default Re: Brakes work fine but get soft when braking hard

Originally Posted by jdowen2
Drain and replace all the fluid with Valvoline synthetic fluid.
LoL! ALL brake fluid is synthetic.
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Old Nov 25, 2012 | 04:55 AM
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Default Re: Brakes work fine but get soft when braking hard

There used to be silicone brake fluid. Supposed to be higher temp. It was used a lot around the SCCA tracks. We never much liked it and used Castrol Dot 4. But that was back in the day.
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Old Nov 26, 2012 | 04:49 AM
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Default Re: Brakes work fine but get soft when braking hard

DOT 5?
http://en.wikipedia.org/wiki/DOT_5
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Old Dec 9, 2012 | 12:01 PM
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Default Re: Brakes work fine but get soft when braking hard

Originally Posted by DCFIVER
LoL! ALL brake fluid is synthetic.
That's incorrect and the LOL needs reversing. Acutally, there is Castor Oil and Mineral oils that are still used for brake fluids -- under the DOT 1, DOT 2, and more. Any competent mfr of brake fluids fluids could elaborate.

Last edited by regnevazota; Dec 9, 2012 at 12:33 PM.
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Old Dec 9, 2012 | 01:10 PM
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Default Re: Brakes work fine but get soft when braking hard

Originally Posted by regnevazota
That's incorrect and the LOL needs reversing. Acutally, there is Castor Oil and Mineral oils that are still used for brake fluids -- under the DOT 1, DOT 2, and more. Any competent mfr of brake fluids fluids could elaborate.
Heres another LoL. There is no such thing as DOT 1 or DOT 2. And the majority of vehicle manufactures stopped using castor oil about 60 years ago. The Depart of Transportation never classified castor oil and started with DOT 3 as the minimum standard....
I stand by my previous statement.
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