Question about 1995 Chevrolet Beretta

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Bled every way imagineable including bleeding the ABS box but never unplugged the ABS box to to bleed as im not sure wether i need to or not.. Still can only get about 1/3 pedal. All 4 apply but pedal goes down 2/3 of the way before applying like there major air but all bleeding produces solid streem. Is this a typical scenario indicating a bad master cyllendar or something else you have to do?

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  • Chevrolet Master
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If the internal seal in the master cylinder has been damaged,pressure will go past it and give a soft pedal. Before replacing it, bleed it again using two people,pump the pedal 5 times,and while holding it down hard,open the bleeder screw.once a shot of brake fluid comes out,make sure the pedal is held down firmly and close the bleeder screw.pump it 5 times again,and repeat 4 times for each wheel,starting with the one farthest from the master cylinder.If that has the same results,get a power bleeder and bleed it that way.

Posted on Dec 30, 2010

  • res0ws961 Jan 02, 2011

    Thanks Kirtec. We did bleed it that way but we did it like 3 times on each wheel. Never got even a slight bit of pedal back. First 2/3 of pedal is just not there at all . Im thinking master cyl as the car sat for a year and a half. I will see if i can get a pressure bleeder tho and try it as a last ditch effort. I appreciate the info. The ABS stuff is all new to me and just wondered if it could be playing a roll with this problem. My friend says he dont think so. He is pretty sharp but getting your opinions being pep that know the systems well seemed like a wise choice before throwing a mast cyl into it. Put 500 in it already and may just spend the money i would pay for the cyl on a refill on accetylene tank, them smile as i show the car how i really feel about it! Heh Heh. LOL Thanks fellas.

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03 chevy 4x4 how do you bleed the abs?replaced all lines and bled with truck off.good pedal til start up then lost all.guy at auto store said abs needs bled.thanks


Have a look on this link below:
chevy abs bleeding Google Search

In particular a Youtube video:

Bleeding the ABS Brake Control Module On Chevy Using Snap On Solus Ultra
Sometimes it can be a nightmare bleeding the brakes. There seems to be problem after problem or no progress, irrespective of how many times you bleed them. Just a few weeks ago I had the same problem on a 4 litre Jeep.

Have a look on those two links. You obviously know how to bleed brakes and will pick up a tip or two online.

I was in the same position as you - hard pedal until start up after a brake overhaul. I wouldn't like to think how many times I bled the braking system everywhere and nothing worked. Eventually on a Jeep forum somebody suggested changing the brake compensator valve. I did .. and the brakes worked perfectly.

Read a few websites first. You'll het there in the end.

May 16, 2016 | Cars & Trucks

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Installed new front brake lines, now after trying to bleed them it supposdly will not let the fluid to bypass the abs. system. ?


Before bleeding brakes make sure you disable abs system. I usually remove the abs fuse for that time. With abs on you cannot bleed brakes properly. If still having problems then check new brake lines for glitches that might have happened during the install.
PS: Don't forget to put back the abs fuse after you are done! Otherwise you still have brakes but not with abs feature.

Dec 04, 2013 | Cars & Trucks

1 Answer

1994 buick lesabre new master cylinder abs light on


Look for a bleeder on ABS HCU unit- the one with brake tubing

Drive it & then Bleed again

Have to hear the abs pump come on,check fuse for it

If that doesn't work may have to open the
hcu with an obd1 scan tool & bleed

Feb 01, 2013 | 1994 Buick LeSabre

1 Answer

No pressure on brake pedal 95 suburban 2500 4x4 7.4L


try bleeding your ABS block first, if that doesn not work could need a master or proportioning vavle. Some scan tools are capable of bleeding the ABS system on some vehicles, and some you have to bleed manually.

Apr 07, 2012 | 1995 Chevrolet Suburban

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Need to know procedure for bleeding brakes on1987 gmc s15 2.8 litre 4x4 front disc w/abs


MANUAL BLEEDING

For those of us who are not fortunate enough to have access to a power bleeding tool, the manual brake bleeding procedure will quite adequately remove air from the hydraulic system. The major difference between the pressure and manual bleeding procedures is that the manual method takes more time and will require help from an assistant. One person must depress the brake pedal, while another opens and closes the bleeder screws.

In addition to a length of clear neoprene bleeder hose, bleeder wrenches and a clear bleeder bottle (old plastic jar or drink bottle will suffice), bleeding late-model ABS systems may also require the use of one or more relatively inexpensive combination valve pressure bleeding tools (which are used to depress one or more valves in order to allow component/system bleeding). To fully bleed the late model ABS systems, a scan tool should also be used to run the system through functional tests.
  1. Clean the top of the master cylinder, remove the cover and fill the reservoirs with clean fluid. To prevent squirting fluid, and possibly damaging painted surfaces, install the cover during the procedure, but be sure to frequently check and top off the reservoirs with fresh fluid.
CAUTION Never reuse brake fluid which has been bled from the system.
  1. The master cylinder must be bled first if it is suspected to contain air. If the master cylinder was removed and bench bled before installation it must still be bled, but it should take less time and effort. Bleed the master cylinder as follows:
    1. Position a container under the master cylinder to catch the brake fluid.
WARNING Do not allow brake fluid to spill on or come in contact with the vehicle's finish as it will remove the paint. In case of a spill, immediately flush the area with water.
    1. Loosen the front brake line at the master cylinder and allow the fluid to flow from the front port.
    2. Have a friend depress the brake pedal slowly and hold (air and/or fluid should be expelled from the loose fitting). Tighten the line, then release the brake pedal and wait 15 seconds. Loosen the fitting and repeat until all air is removed from the master cylinder bore.
    3. When finished, tighten the line fitting to 20 ft. lbs. (5 Nm).
    4. Repeat the sequence at the master cylinder rear pipe fitting.
During the bleeding procedure, make sure your assistant does NOT release the brake pedal while a fitting is loosened or while a bleeder screw is opening. Air will be drawn back into the system.
  1. Check and refill the master cylinder reservoir.
Remember, if the reservoir is allowed to empty of fluid during the procedure, air will be drawn into the system and the bleeding procedure must be restarted at the master cylinder assembly.
  1. On late model ABS equipped vehicles, perform the special ABS procedures as described later in this section. On 4 wheel ABS systems the Brake Pressure Modulator Valve (BPMV) must be bled (if it has been replaced or if it is suspected to contain air) and on most Rear Wheel Anti-Lock (RWAL) systems the combination valve must be held open. In both cases, special combination valve depressor tools should be used during bleeding and a scan tool must be used for ABS function tests.
  1. If a single line or fitting was the only hydraulic line disconnected, then only the caliper(s) or wheel cylinder(s) affected by that line must be bled. If the master cylinder required bleeding, then all calipers and wheel cylinders must be bled in the proper sequence:
    1. Right rear
    2. Left rear
    3. Right front
    4. Left front
  2. Bleed the individual calipers or wheel cylinders as follows:
    1. Place a suitable wrench over the bleeder screw and attach a clear plastic hose over the screw end. Be sure the hose is seated snugly on the screw or you may be squirted with brake fluid.
Be very careful when bleeding wheel cylinders and brake calipers. The bleeder screws often rust in position and may easily break off if forced. Installing a new bleeder screw will often require removal of the component and may include overhaul or replacement of the wheel cylinder/caliper. To help prevent the possibility of breaking a bleeder screw, spray it with some penetrating oil before attempting to loosen it.
    1. Submerge the other end of the tube in a transparent container of clean brake fluid.
    2. Loosen the bleed screw, then have a friend apply the brake pedal slowly and hold. Tighten the bleed screw to 62 inch lbs. (7 Nm), release the brake pedal and wait 15 seconds. Repeat the sequence (including the 15 second pause) until all air is expelled from the caliper or cylinder.
    3. Tighten the bleeder screw to 62 inch lbs. (7 Nm) when finished.
  1. Check the pedal for a hard feeling with the engine not running. If the pedal is soft, repeat the bleeding procedure until a firm pedal is obtained.
  2. If the brake warning light is on, depress the brake pedal firmly. If there is no air in the system, the light will go out.
  3. After bleeding, make sure that a firm pedal is achieved before attempting to move the vehicle.

Hope helps (remember to rate this answer).

Apr 13, 2011 | 1987 GMC Jimmy

1 Answer

I have a 2002 Pontiac Bonneville. Brake Fluid is leaking from ABS box. What to do?


if you have fluid that is only leaking from the abs unit and the brake lines are all tight and not leaking at the unit then you have an abs unit leak and it will have to be replaced and bleed as well as the entire system should be bled to get all the air out.the unit may have to be bled by the use of a scan tool with the capablility to bleed the unit electronically

Mar 15, 2011 | 2002 Pontiac Bonneville

3 Answers

No brake pressure


should not need to bleed module try giving the proportion valve afew good smacks sometimes this will dislodge the valve then rebleed

Jun 03, 2009 | 1998 GMC Jimmy

2 Answers

Brake pedal goes to floor after bleeding the brakes many times


start off by pumping the peddle 25 times with engine off ... bleed the abs system (usually has bleeder valves near/on control unit). then bleed the rest as usual with engine off ... DO NOT turn the key on while bleeding abs brakes.

Mar 18, 2009 | 2000 Dodge Caravan

1 Answer

04 free star soft pedal has new master cylinder pads and rotors


the master cyl must be filled and bled before install.after installing new bled master cyl,bleed all calipers.once you are sure there is no air left in system then you will need a scan tool to perform a abs service bleed.if you do perform the abs service bleed with a scan tool the brake pedal will be soft and start to fade.

Nov 12, 2008 | 2004 Ford Freestar

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