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#1
03-03-2007, 11:32 AM
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CRX Spongy / No Brakes
Anyone have any suggestions for this? I have a 91 CRX and the brakes are firm with the engine off, but slowly go about halfway to the floor. Engine running, the brakes go to the floor all the way; Here are the observations:
No external leaks or drips obvious Brake pads still have pad life Have not opened up the system and the master cylinder is full (no usage) No signs of cracked hoses or leaks Can air still be introduced into the system without opening up the system? The fluid probably needs changing....As far as I know the booster has never been replaced or the master cyliner (car has 170K). Thanks for any info you guys can provide... 
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#2
03-03-2007, 05:10 PM
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Re: CRX Spongy / No Brakes
Bad master cylinder
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#3
03-04-2007, 06:55 PM
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Re: CRX Spongy / No Brakes
Quote:
But first try a fluid flush/change and see if that helps any to get rid of the air. From my experience the MC's on these cars don't last forever and need replacing some time or another.
__________________
1989 Civic STD - sold 1991 CRX Si - current Free Service Manuals: http://hondatech.info/
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#4
03-04-2007, 07:02 PM
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Re: CRX Spongy / No Brakes
wouldn't the booster be the more likely problem since the brakes get spongy when when the engine is started Usually a master cylinder problem will make the brakes spongy even with the engine turned off
__________________
89 crx SI - spoiler, custom viper blue paint job, Z6 just completed, stock 14's with a 3 inch drop, sidemarkers, and the stereo "my crx is like my woman: don't like anyone touching her, or driving her but me!" 
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#5
03-04-2007, 07:03 PM
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Re: CRX Spongy / No Brakes
me bad I didn't read the post properly..
__________________
89 crx SI - spoiler, custom viper blue paint job, Z6 just completed, stock 14's with a 3 inch drop, sidemarkers, and the stereo "my crx is like my woman: don't like anyone touching her, or driving her but me!"
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#6
03-04-2007, 07:05 PM
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Re: CRX Spongy / No Brakes
That's what I was thinking Viper, but I'm not sure...? The pedal goes all the way to the floor when the engine is running, but is firm when the engine off..
Quote:
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#7
03-04-2007, 07:11 PM
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Re: CRX Spongy / No Brakes
if it only sinks to the floor with the engine running thats what I would suspect. But I re read your post and it said the pedal is firm but slowly sinks to the floor with the engine off
http://www.crxpower.net/~silverkorn/...hop_Manual.pdf look for the heading "booster"..this site has tests for the braking system and should help you narrow down the cause
__________________
89 crx SI - spoiler, custom viper blue paint job, Z6 just completed, stock 14's with a 3 inch drop, sidemarkers, and the stereo "my crx is like my woman: don't like anyone touching her, or driving her but me!"
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#8
03-04-2007, 07:17 PM
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Re: CRX Spongy / No Brakes
watch your rpms when the pedal sinks...usually a bad booster will make the idle shoot up to compensate for the vacuum leak a bad booster will create..otherwise it must be the mc...or the back brakes aren't adjusting
__________________
89 crx SI - spoiler, custom viper blue paint job, Z6 just completed, stock 14's with a 3 inch drop, sidemarkers, and the stereo "my crx is like my woman: don't like anyone touching her, or driving her but me!"
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