Question about 1997 Dodge Caravan

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How to fix intermittent brake pressure loss

For no appearant reaon the brake pedal sinks to the floor . there are no visable leaks in the system

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Check servo unit and look for leaks on the engine compartment, about the servo could be a vacuum problem, check its work and the hoses going to it
hope this helps

Posted on Nov 18, 2009

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Hi:
If you intermittently have your brake pedal go to the floor, you need to give this immediate attention, as this is a safety concern. First, check the fluid level in your brake master cylinder. If it is full, you most likely that you have a failed brake master cylinder, if there are no obvious leaks or fluid loss

Posted on Nov 18, 2009

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`How do I determine if the brake master cylinder is failing ? No fluid leaks brakes do not pump up when bleeding system,recently brake pedal stayed down to floor, pulled back up with my foot.


If there are no external brake fluid leaks, continued application of pressure on the brake pedal will see the pedal sink to the floor if the MC is faulty and needs to be replaced. This will be due to significant wear inside the MC in the bore and on the pistons.

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Intermittent loss of brake pedal,only happned three times but customer says it went to the floor


If this is a hydraulic brake system, the first thing to do is to check the brake fluid level in the reservoir. Assuming that it is not down, the problem will probably be in the master cylinder. Try pushing the brake pedal down very slowly. This will not put a lot of pressure on the seals in the master cylinder, and if there is a problem, the brake fluid will leak past the seal allowing the pedal to go slowly to the floor. If you push the brake pedal down rapidly, the pressire on the seal will hold it against the master cylinder wall, and the brakes will hold fine.
If the fluid level in the reservoir is low, look at all of the wheels and slave cylinders to see if you can locate a leak. I don't suspect a leak based on your description of the problem, but it's worth checking.

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Renault megan. Intermittent loss of brakes, then pedal goes hard


Make sure the emergency brakes are back off and adjusted after pad replacement. A lot of mechanics forget or don't know about this. Also check the master cylinder. Push on brake pedal hard and see if it sinks to the floor, if it does then the master cylinder is bad. If there is air in the brake system it is best to pressure bleed or vacuum bleed the brakes to get the air out. Often when using the two person pump the pedal and hold will not be effective in getting all the air out if a line is broken and then replaced. Amazon com Online Shopping for Electronics Apparel Computers Books DVDs... and Automotive parts!!!

Jan 17, 2015 | Renault Cars & Trucks

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Why do i have loss of brake pressure


Long shot: Bad master cylinder - Typically the brake pedal will slowly sink to the floor. On early 2000 vintage Chrysler products you need to check brake lines as they have been known to rust (and fail catastrophically)

Jul 04, 2014 | 2003 Jeep Wrangler

1 Answer

Brake pedal sinks to floor when at stop light


The brake system has air in it or a leak past the seals if it does this while stopped.

Are you losing fluid from the reservoir? A leak.

Can you improve the feel of the pedal by pumping it? Air.

Maybe both if the system has not be flushed or maintained for a while.

Nov 09, 2013 | Ford F150 Cars & Trucks

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Brake pedal sinks to floor


Losing fluid somewhere or losing pressure in the master. Will need to be serviced by a shop. Can't drive it this way.

Sep 10, 2012 | 2005 Mazda 3 Sedan

1 Answer

Brakes have a mushy to floor response


usually an indicator of either a loss of pressure due to low fluid and/or air in the system (brake fluid leak) or extremely worn rear brakes (if drum brakes in rear). possible causes include master cylinder (internal fluid pressure leak), external fluid leaks (calipers, lines, wheel cylinders), rear drum brakes extremely worn down or severely out of adjustment. normally worn disc brakes may reduce pedal height SOME, but seldom "to floor". but the "mushy" quote combined with the "floor" quote suggests a hydrolic fluid pressure problem.

Sep 13, 2010 | 2005 Ford Taurus

1 Answer

Loss of Pressure in Brakes


Most likely time for some new pads/shoes and check rotors/drums

The things you should check are:

1. Fluid level in the master cylinder, if this is low you have a leak somewhere and it needs to be fixed, if it is a '96 it could have a leak in a caliper seal or a wheel cylinder and it would be tough to see.

2. If it has been a while since you have changed them check your pads/rotors for wear

3. If the pads are good, bleed the air out of the system. however air in the system usually causes the pedal to feel "spongy" and not just sink to the floor

Feb 19, 2009 | 1996 Honda Accord

1 Answer

Clutch pedal goes to the floor on A6 2.8 P 1997


It's a hydraulic system on the Audi. Using a master cylinder (nearer pedal and firewall) and a slave cylinder (at clutch release bearing itself, or on side of tranny. Owner's manual should give location for a reservoir to check. Similar but smaller than brake master cylinder reservoir if that helps. The system uses brake fluid, and you either have a leak, a lack, or a loss of this fluid, and/or pressure to the clutch. Sounds like you need qualified service, these systems need REAL diagnosis before you start buying parts. ALso can be hard to bleed completely free of air after parts are installed.

Jan 27, 2009 | 1997 Audi A6

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