Question about 1990 Chevrolet Corvette

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Sometimes brake pedal gets soft and has to be forced to floor board to stop car. When car is turned off and restarted the brake pedal comes back to like it is suppose to be..

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Probably a vacuum leak in a hose or the canister itself, you have bled all air out of system at each wheel first?

Posted on Sep 10, 2010

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What would cause no power steering or brakes when started one time but then there next start?


Was your brake pedal on the floor or hard to depress? Your chattering might be the serpentine belt system. Remove the belt and test quickly again for noise, you will not have powersteering or cooling or charging systems, but you are just trying to pinpoint your chattering so you dont have to guess. You might want to replace your vacuum valve at power brake booster if your pedal was hard. It is a oneway valve that opens when the car gets turns on and pulls down a vacuum to assist the brake system. Sometimes the stick. If your brake pedal was on the floor, which I doubt at all, do not drive and seek professional help. Maybe your pedal assembly is coming loose and needs repinned.

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Soft brake pedal


bleed the brakes again . start with the rear right wheel then rear left then right front . do it several times and ensure there is no air in the system

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The brake pedal went to the floor and my son in law almost couldn't stop. I changed the master cyl. The pedal feel got better but still goes down. Does not have a firm feel to it very soft. Sometimes...


just because you installed a new part doesnt mean its not defective....pull the wheels off and check to see if the pistons move freely in the calipers(remove calipers and try to press in with channel lock plyers). see if rear wheel cylinders are working with drums on , have someone press the brakes and you turn the drums.

Aug 19, 2011 | 1995 Toyota Land Cruiser

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I have a 96 geo prizm. I have replaced the front and back brakes. I have bled the brakes and the foot pedal is firm for about the first4 days. After the 4 days the brake pedal gets really soft and you...


It sounds like master cyl. is drawing in air causing prob. also another test would bee too bleed out and get pedal back, now step on pedal and hold firmly and see if pedal creeps near floor indicating innternal leaking in master cyl. also have some one pump bakes slowly aand look for air bubbles in brake res. after bleed out indicating master cyl. is drawing air upon release of pedal.

Jan 24, 2011 | 1996 Geo Prizm

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2001 kia sportage soft brake pedel still doing a complete brake job same as before changing the calipers/pads/ shoes /master cylinder /brake cylinders rear/ bleeding comp. system ? ANY HELP .yet the low...


hi from the uk have had this problem on a customers car b4 who had replaced frot calipers and pads and pedal went to floor on inspection of caliper i found that the steel spring clip that fits into two holes in the front face of caliper and must also locate behind the caliper carrierbehind two lugs was fitted incorrectly it had been fitted behind the outer pad resulting in when brake pedal off ?the caliper being floating type as it is known because it is fixed by two screw pins/bolts and moves on these pins/bolts as pads wear ? what happens is the spring fitted wrongly ? actually pushes against the outer pad and as a result the caliper piston is pushed back into its cylinder slightly as it moves on the locating pins/bolts resulting in pedal going to floor on 1st application but if pumped ? some brake pedal force is felt but is lost again when pedal released ? so try this ? remove the steel clips from both front calipers that retain caliper to carriers then press brake/pump pedal ? if as suggested above works? your pedal should pump up and remain ok when you release and still be firm when re applied ? all above is what i found on ford ford but many other models use similar calipers and spring locating recheck how this spring should locate hope this helps ? good luck

Mar 19, 2010 | 2001 Kia Sportage

1 Answer

ABS and Brake light stay on plus pedal is soft after tight turn


sounds like you have low brake fluid pressure and the pressure sensor is turning on warning lights saying there is low pressure and also pedal going to floor indicate this, sounds like master brake cylinder is worn out/broke and needs replace ment

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1 Answer

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Add brake fluid and bleed the air out of the brake lines.

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1 Answer

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the brakes have to be bleed you wrote that when you start the car the pedal goes to the floor that means the booster is working fine take it back and tell them you want the brakes bleed

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