Question about 1991 Oldsmobile Ninety Eight

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Master cylinder problem or what

I have to push the breaks all the way to the floor. Is that a power booster or master cylinder

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A bad power booster will cause a hard pedal, u have a master cylinder problem

Posted on May 21, 2009

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Posted on Jan 02, 2017

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2 Answers

On a 97 gmc truck when you push the brake you can hear air from the brake booster into the cab of the truck and brake travels freely to the floor


When a vehicle is turned off, the brake pedal should remain firm. However, if the driver pushes the pedal lightly and it sinks to the floor, the master cylinder has an internal leak.

Feb 17, 2017 | GMC Cars & Trucks

2 Answers

When i push down on the brake pedal air leaks out around the rod and the pedal goes to the floor.


Check the vacuum line on the power brake booster, the diaphram may be pushing the air down the rod, the break booster may be defective all together if the vacuum line is intact.

Mar 30, 2011 | 1983 Ford Thunderbird

1 Answer

I have a 96 ford explorer xlt 4wd with ABS. When I bought it it had a broken back break line. I replaced the line blead the breaks and the breaks are spongy. I googled the issuse and found out it could be...


Check your parking brake. if it goes down to the floor or does not hold, then your back brakes needs adjusted. bad master cylinders bleed off slowly to the floor while pushing on the brake pedal. If you need assistance on adjusting let me know.
Randy

Nov 09, 2010 | 1996 Ford Explorer

1 Answer

I had a low brake pedal so i changed the master cylinder but after the change pedal is higher but seems to be hard to push like i have no vacume fo the booster


did you hook the back blast valve back up to the booster mon........ also check the plastic valve in the line to the booster to make sure its working if that don;t fix it then either you have a bad booster or you put the wrong master cylinder on it cause the one for standard breaks? the hole in the end of the master cylinder isnt as deep and the one for power breaks

Jan 18, 2010 | 2003 Volvo XC90

3 Answers

No brakes push pedal to floor


leaky rear break cylinder or master cylinder

Oct 02, 2009 | 2001 Chevrolet Blazer

1 Answer

Need to replace a brake booster on a 1998 chevy cavalier


get ready for some work.you need to remove the master cylinder nuts that hold master cylinder to brake booster.once you remove nuts you have 2 choices remove master cylinder to remove booster. to keep from bending brake lines.or you can leave master cylinder in pull it toward you easily careful dont bend lines .disconnect vacuum line at booster .go inside vechicle to floor on driver side loosen four nuts on floor to booster .disconnect power brake push rod from brake pedal .dont force pushrod to the sides when disconnecting it.remove four booster nuts then remove booster.when in stalling the new booster loosely install four nuts then connect the push rod to the brake pedal .install new clip tighten the booster unit .if you decide to remove master cylinder use inline wrenches on master cylinder to remove lines.also plug the master cylinder brake line holes to keep from losing all brake fluid.

Apr 26, 2009 | 1998 Chevrolet Cavalier

2 Answers

Need Break Booster Replaced


The brake booster/ naster cylinder is located on the firewall on the drivers side of the vehicle. The master cylinder has a resivour (sp) which has a cap and holds brake fluid. The brake booster is right behind that, the master cylinder is bolted right to the booster. The booster looks like a big circle about 10 to 12 inches round and usually 4 to 6 inches thick. It will have a vaccum hose coming off the booster and going to the intake manifold. The master cylinder with have hard lines coming off it which are brake lines. Hope this helps.

Mar 25, 2009 | 1992 Dodge Grand Caravan

1 Answer

Braking


take the top off the master cylinder and while someone is pushing the break pedal down, looks for bubbles coming up in the master. Master cylinder probably needs rebuilding or replacing.

Jun 26, 2008 | 1995 Honda Accord

2 Answers

Breaking


there is a big rober hose by the power booster start the car up and then turn the car off then unplug the hose if you hear like air the the booster is ok but if not then most likelly the powwer booster is not good

May 27, 2008 | 2002 Pontiac Grand Prix

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