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Schematics for 1996 chevy lumina brake system --brakes are not getting pressure after lines are bleed, master cylinder replaced

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6ya6ya
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Posted on Jan 02, 2017

Jay_from_Ma
  • 99 Answers

SOURCE: 1998 chevy C-1500 brake problems

Try a clean and adjust on the rear shoes, because sometimes when they aren't properly adjusted they won't seem to work properly. Also there is a common "squishy" petal feeling after brake work on most all larger GM's around that year, wich I have run into several times. Try test driving it, and put a couple miles on it, That usualy helps.
Good luck!

Posted on Dec 17, 2008

  • 232 Answers

SOURCE: Spongy brakes after bleeding them 2 times. Should I try to bleed the master cylinder or replace it?

Honestly your guess is as good as mine. But I don't think the master cylinder is NOT bad you still have air in the system. Get a big bottle of brake fluid bleed all four sides until you run out of fluid or your brakes work properly. You should divide the bottle's content in four, then use each quantity in each side. You'll be removing air and contaminated fluid from the system. Get a small hose that fits on the bleeders and an appropriate container. I have a good feeling if you do this your brakes will work just fine. I don't know how you are bleeding the brakes. I'll let you know the proper way just in case. This is a two man job, with the wheel off, have someone start the car. Have them pump the brakes a few times to get pressure. 1With the brake pedal UP open the bleeder, 2then have your assistant press the brake pedal all the way down and leave it completely pressed down. 3Close the bleeder valve, once close and only with the valve closed have'm release the brake. Repeat as necessary, bake depressed, open valve first then press brake. DO NOT depress until valve completly closed. Close valve THEN depress. Good Luck!

Posted on May 15, 2009

  • 1 Answer

SOURCE: 2003 town and country brake problem

Did your mechanic use a DRB III or equivalent scanner before performing the bleeding procedure after installing the master cylinder? This is a requirement by the manufacturer (Chrysler) when bleeding the brake system.

Posted on May 15, 2009

  • 225 Answers

SOURCE: brake bleeding

if you didn't bleed the lines after putting the master in. then there is a good chance there is air in the lines now. may go through a quart of brake fluid before all the air is out. remember to start at r-rear/ l-rear/ r-front/ l-front last.will take some time. don't forget to adjust the rear brake while your there to help with the pedal

Posted on Aug 13, 2009

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SOURCE: 2001 kia sportage soft brake pedel still doing

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

Posted on Mar 19, 2010

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2 Answers

Bled brakes on my 1999 chevy blazer still goes to floor


this is an indication that there is still air in the system and the bleeding process was inefficient. Bleed the lines at the master cylinder first by loosening off the lines and holding the pedal down until the lines are retightened. Then starting at the longest line first bleed the system finishing at the shortest line . Keep the fluid level in the reservoir topped up at all times.

Apr 21, 2014 | 1999 Chevrolet Blazer

1 Answer

Abs brake system


Best case scenario bad vacuum pressure to the brake booster. Worst case bad abs control module or valve body/motor the abs system works by add and removing hydraulic pressure through valves and electric motor. Try using block off plugs at the master cylinder( remove lines plug outlets at master cylinder) check if brake pedal position and pressure is good(if there is no change problem is master cylinder or brake booster/ vacuum) if plugging at master cylinder solved issue repeat procedure at abs valve body after reinstalling lines from master cylinder if your problem returns your issue is in the abs valve body if plugging at the abs solves problem reconnect at the valve body bleed each line one by one testing between each line until you find the problem

Apr 11, 2014 | Hyundai Cars & Trucks

1 Answer

Chevy blazer brake pedal going to the floor when engine is running


has to be air,try bleeding without the brake pedal,just open
the bleeders and let gravity run the fluid out,takes awhile but works.
(master cyl.cover off )

Dec 25, 2012 | 1999 Chevrolet Blazer

2 Answers

2000 mercury cougar.....no brake paddle we replaced master cly,booster......what can it be


did you bleed all of the air from the master cylinder before you installed it, this has to be done. also when replacing the master cylinder, all 4 wheel cylinders will have to be bled, in order to get all of the air out of them. while doing the wheel cylinder bleeding , you will have to make sure that the master cylinder doe's not run out of brake fluid, check it each time you bleed a wheel cylinder , add brake fluid to the master cylinder each time or when it is getting low. hope that this has helped you.

Apr 16, 2011 | 2000 Mercury Cougar

2 Answers

My 1997 chevy 1500 z71 brakes suddenly going all the way to the floor. Checked brake fluid and it was low. Could be wheel cylinder? Master cylinder? or ?


well, check the brake lines for leakage after adding brake fluid to the full mark. If the brake pedal goes all the way to the floor, it's likely there is a leak somewhere after the master cylinder. If the pedal gets hard after adding fluid, and pumping it several times with the car off, then the master cylinder is still ok.

If air has gotten into the master cylinder, it may have to be bled out on a bench, or using a scanner if that's the way your vehicle is.

Bleeding the Brake System (ABS) Auto Bleed Procedure NOTE: Perform a manual bleeding procedure. If the brake pedal height and firmness results are not achieved, perform the auto bleed procedure below.
NOTE: Perform this procedure when replacing the brake pressure modulator valve or electro-hydraulic control unit.
  1. Perform the manual brake bleeding procedure. Refer to Bleeding the Brake System (non-ABS).
  2. Check the master cylinder fluid level often to prevent running the system dry.
  3. Press the brake pedal firmly and run the Scan Tool Automated Bleed Procedure (for Gas engines) once, or the Function Test (for Diesel engines) four times. Make sure to release the brake pedal between each test.
  4. Perform the manual bleed procedure again. This should remove the remaining air from the brake system.
  5. Bleed the system as many times as needed to obtain the appropriate feel of the brake pedal.

Dec 18, 2010 | 1997 Chevrolet K1500

1 Answer

No brake fluid to the rear wheel cylinders


You'll need to start bleeding the brake system at the Master cylinder to determine where the problem lies.

The lines coming out of the master cylinder will need to be loosened & bled there, initially you can just do the back ones to identify the problem, but once fixed, the system will have to be bled from the Master cylinder first, then the farthest wheel from it, then next farthest, then next, until you do the drivers wheel last.

This method of bleeding the brakes prevents air from crossing from one line to another, causing air to be left in the system.

Back to bleeding the rear brakes first: As someone pumps up the brake pressure, making sure the resivoir stays full, with the cap on between bleeding, and have the person pressing the pedal to do these thngs.
1. Always move the pedal slowly, pressing and releasing.
2. Never release the pressure on the pedal after bleeding a brake, until the line is tightened, then release slowly to prevent air from getting into the fluid.

You should of course get fluid at the master cylinder when you bleed it (or just replace it), then you'll need to bleed the line at the right rear wheel (first) a few times to get fluid if it's been leaking, then the left rear wheel. If you get pressure but no fluid to the rear and the master cyliinder did have pressure released when you bled it, there is either a restriction in the line itself, or the porportioning valve could be damaged. (unusual for the valve to go bad actually, inspect lines for damage such as being pinched if you're getting pressure but no fluid.

Final test if it hasn't been resolved-remove lines at porportioning valve & make sure fluid is leaving/entering there as it should. If you find it defective, a good replacement can come from a salvage yard, or you can buy them new.

Brake fluid on the floorboard under the dash near the brake pedal=bad Master Cylinder.

good luck

Feb 21, 2010 | 1996 GMC Jimmy

3 Answers

No pressure in bakes


either there is a leak in brake system or you have to bleed your brakes.

Oct 05, 2009 | 1996 Chevrolet Lumina Mini

2 Answers

93 chevy lumina the brake lines aren't getting fluid


Open the bleeder screws on your brake, and stick a gas line hose on the bleeder screw. Put the other end in a clear bottle of brake fluid, and pump the brake till all the air bubbles quit coming out. Then tighten the bleeder. If no bubbles come, you may have a faulty master cylinder.

Jun 06, 2009 | 1993 Chevrolet Lumina

1 Answer

Unable to bleed front brakes


loosen the front brake line that goes to the master cylinder fill master cylinder up with fluid and bleed it first by attaching a flexible line from master cylinder front brake side submerge that line into jar of brakefluid keeping air from entering line get someone to pump brake pedal while ur holding line in a jar keep refilling the brake resivoir so no air gets in, once the master is bled front brake side then reattach the origional brake line then remove bleed screw from caliper and let fluid gravity flow down to calliper then bleed the normal way. more than likely your master cylinder has air trapped in the front portion good luck

Jul 01, 2008 | 1996 Chevrolet Blazer

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