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1990 Honda CRX Trouble
11-29-2007, 06:43 PM
Post: #1
1990 Honda CRX Trouble
trying to bleed the brakes, i replaced the flex lines in the rear of the vehicle master cylinder was empty. after line replacement i filled the master cylinder and turned a bottle of brake fluid upside down into the resivor to ensure that the master cylinder would not go dry when bleeding. i did the sequence by the book and the pedal feels nice and firm. as soon as i start the engine the pedal goes almost all the way to the floor. i turn the engine off and bleed off the vacum in the booster and then the pedal is nice and high and firm once again. does any body have any ideas. it is a non ABS vehicle. thanks
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11-30-2007, 12:24 AM
Post: #2
RE: 1990 Honda CRX Trouble
This has worked for me in past; try bleeding with eng at idle.
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11-30-2007, 08:24 PM
Post: #3
RE: 1990 Honda CRX Trouble
I have seen older master cyls. go out when you lose brake fluid and the pedal goes to the floor. The seals in the master cly. bore goes beyond there noraml worn-in travel point and it damages the seals.

Cary Joe York
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12-09-2007, 03:14 PM
Post: #4
RE: 1990 Honda CRX Trouble
I'm inclined to go with what CJY just said but before you jump to conclusions check the rear brake adjustment because pumping the pedal several times might give you a false feel and be masking the mis-adjustment issue.

If the MC has gone bad (as per CJY) you may be able to pump it up while the engine is running but under normal pedal pressure it will fade down in a second or two. If you release the pedal and wait 5 seconds and get a low pedal again then adjust the rear brakes first.

Rupe
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