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I'd need help with 2.8 Nissan brakes booster had pedal when went to engine specialist now pump it's firm but when start it goes to floor

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  • Nissan Master
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Take it back to him and have brakes bled properly .

Posted on Apr 07, 2015

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Posted on Jan 02, 2017

  • 2 Answers

SOURCE: Brakes no longer work in 1989 Chevy half ton pickup 2 wheel drive 350cubic inch

change dump valve under master cylinder

Posted on Aug 17, 2008

  • 1779 Answers

SOURCE: 1998 chevy s10- brake pedal goes to the floor-

Did you put fresh fluid in the master cylinder? I really think you still have air in the lines. To bleed manually, start with the bleeder the greatest distance from the master cylinder, car running, helper pushing down about half way on brake pedal and releasing 3 times, on 3rd time, holding pedal down to half way depressed point while you open the bleeder valve. Repeat until you are sure all air has been flushed out. Check master cyl reservoir level often, because if it gets low and you **** air into the system, you have to start all over again. Go to wheel next greatest distance from master cyl, repeat above, working your way to wheel closest to master cyl last.

Posted on Apr 12, 2009

  • 8 Answers

SOURCE: brake pedal goes to floor

there is still air in your hydraulic lines somewhere bleed the system with a pressurised power bleeder and you will get instant results

Posted on May 01, 2009

  • 64 Answers

SOURCE: Fiat Uno Pacer - Brake Booster not assist braking

it could be that the master cylinder is bad or the brake booster is bad also check the vacum hose going to the brake booster if it has a hole in it it will lose pressure and make the engine lose rpms

Posted on Aug 23, 2009

emissionwiz
  • 75051 Answers

SOURCE: brake pedal dropping to floor

do u have the antilock brake bleeding tool? if not you will need to have the dealer bleed the brakes, the ABS control valve must be electricaly held open to bleed the brakes there of course is a special tool for this.

Posted on Oct 18, 2009

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1 Answer

How do I check if the brake booster is working?


Pump the brake pedal with the engine off. Pedal should get firm. Hold pressure on the brake pedal while you turn the engine on. Pedal should drop about 1/4 indicating booster is working.

Dec 30, 2015 | Nissan Pickup Cars & Trucks

1 Answer

How do i correct brake pedal that goes to floor


Power booster is bad, or you didn't bench bleed the master good and it still has air in it.

Jul 21, 2014 | 2000 Chevrolet Blazer

1 Answer

Power brake booster


get a new one but perhaps this is not the problem brake boosters seldom go bad. press on brake pedal a couple times until firm. then start engine while holding brake pedal the pedal should move down towards floor upon start up. if this is not true then check to see if the air line from the manifold to brake booster is in good non cracked and make sure you are getting good manifold pressure as well. repair hose or manifold if your not getting good pressure then check booster again as described above

Apr 22, 2013 | Nissan Pickup Cars & Trucks

3 Answers

Are there vacuum hose on the brakes hydraulic system?


NO. the vacuum is used to make the brake pedal easy to push, power brakes. the pedal would be hard without vacuum, that is why the pedal gets hard with the key off and engine not running. the problem you are having is more of a hydraulic problem.
Have the brakes checked asap. the brake system may have a leak causing the pedal to go low. check the fluid level and if it is low or empty then there is a problem, could be a rotted brake line leaking or a wheel cylinder leaking.

Dec 07, 2012 | 1997 Ford Probe

1 Answer

My brake pedal goes all the way to the floor


Brake pedal goes to the floor? When does it happen. That is the most important piece of information. Most brake systems are power assisted via vacuum from the engine. Your brake booster is what makes the "power assist" work. There are some specific times when you will feel your brake pedal "fade" to the floor and it is normal due to the cycle of the brake components operation.If your brake pedal goes to the floor every time you step on it, stop driving and get to a repair facility! If the pedal is working when driving and the vehicle seems to be working as it always has, then chances are there is no concern. To be on the safe side, have it checked the next time you are in for any other type of service.There is a sensor inside most brake reservoirs that activates the indicator light in your instrument cluster when the level is lower than it should be. As your brake pads wear down, the system requires more fluid so the level at the reservoir drops setting the light. Same thing if there is a leak. The fluid level drops and the light goes on. This brake fluid leak would most likely be combined with a spongy pedal or a pedal fade every time you step on the brakes. A leak would also almost always have a wet area around the leak. Sometimes the leak can be internal to a part of the car you cannot see, so don't count on it.One easy way to check most brake boosters and the brake system for leaks is to turn the vehicle off and pump the brake pedal. Every time you depress the pedal you should feel the pedal "height" come up and the pedal get harder. After a few firm pumps of the pedal, hold it down. Leave pressure on the pedal for 20 seconds or so. Does the pedal move slowly (or quickly) to the floor? If so then there is a leak somewhere in the system. Keeping pressure on the brake pedal, start the vehicle. Does the pedal no drop? It should. That is the power assisted vacuum kicking in as the engine starts to run.The bottom line is that we are talking about your brakes. Your life, your passengers lives and the lives of others on the road around you depends on that system working properly. If you have any doubts, or feel uncomfortable, take it in to have it looked at. Know specifically what it is doing so that you can have your repair facility look at what you are feeling and tell you if

Oct 29, 2011 | 1987 Nissan Pickup

3 Answers

Have a 1993 dodge Caravan SE. Purchased it from a man which converted it from ABS to hydraulics. I didn't know it had brake problems till i got it running. He put on a 3 outlet 2 inlet proportional...


if something goes wrong with abs the brake system it reverts back to standard system!! If you can pump brake pedal up and hold it and start engine and it drops thats normal.You say low pedal if you go 15mph on road and check where pedal is when brakes apply.Power brakes will push aLMost to floor while stopped but while moveing you`ll almost go to slide or will go into slide if pedal is pushed to floor.Get on some gravel at 10 mph and hit brakes to a complete stop get out and check to see if all 4 tires slid or 2 front or only 2 rear. this will get you closer to problem good luck.

Jul 12, 2011 | 1993 Dodge Caravan

1 Answer

Fading brake pedal when engine running , have replace front pads, master cylinder and bleed entire system, pedal is firm with engine off but once started pedal fades to floor


Hold pedal down firmly with vehicle not running. Now start it up still holding pedal down firmly. Does it go to the floor when engine is started? If so I would look at the brake booster. It may be defective.

Nov 21, 2009 | 1991 Nissan Pathfinder

2 Answers

With motor running, brake pedal goes to floor and swoosh of air is heard


Could be brake booster leaking. When engine is off the brake pedal should be firm and not go to the floor. If the pedal goes to the floor engine off, there may be a master cylinder problem also.

Oct 28, 2009 | 2005 GMC Envoy Xl

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