Question about 1994 Chevrolet C1500

2 Answers

Got a 94' chevy 1500 having brake problems, and replaced the master cylinder and bled the lines. but the pedal is still not working right, the pedal when pushed with the truck running will just go to the floor, and slightly pick up a little resistance but will not really do much. with the truck not running i can pump the brake pedal stiff but once i turn the engine on the pedal goes limp....HELP

Posted by on

Ad

2 Answers

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    Superstar:

    An expert that got 20 achievements.

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

  • Master
  • 771 Answers

With he engine running your pedal action is assisted greatly by the brake servo. The servo is a large diaphragm that is acted on by the suction delivered by a vacuum line from the the intake manifold. The fact that the pedal goes to the floor when the engine is running just shows how much assistance the engine suction provides to your foot pressure. It is obvious that you still have air in your system. I would suggest that you top up the master reservoir, start your engine and pump the brakes quickly until you feel some hard back pressure. This will ensure that the brake pistons have been fully extended. Starting with the most remote caliper (right rear) bleed off about half a pint of fluid. Ensure that no air is allowed to **** back in via the bleed nipple at any time. Refill the master reservoir. Next the left rear caliper, bleed off about a quarter of a pint. Refill reservoir. Bleed off a about quarter of pint from both front brakes. This should sort it out.

Posted on May 13, 2010

Ad
  • Level 1:

    An expert who has achieved level 1.

    Corporal:

    An expert that has over 10 points.

    Mayor:

    An expert whose answer got voted for 2 times.

    Problem Solver:

    An expert who has answered 5 questions.

  • Contributor
  • 14 Answers

Have you check for any leaks?

Posted on May 13, 2010

Ad

1 Suggested Answer

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi,
a 6ya expert can help you resolve that issue over the phone in a minute or two.
Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of.(from cars to computers, handyman, and even drones)
click here to download the app (for users in the US for now) and get all the help you need.
Goodluck!

Posted on Jan 02, 2017

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

1 Answer

Brake and ABS light is on and pedal goes all the way to the floor. What's wrong?


Sounds like you still have air in the system try this crack the lines lose at the master have someone push pedal down and hold than tighten lines try this about four times than bleed the wheels starting at right rear l/r r/f l/f let me know how you make out

Mar 05, 2016 | 2001 Dodge Ram 1500 Truck 2WD

2 Answers

Soft brake pedal on 94 gmc sierra


in late model GM and Ford cars with quick take-up master cylinders, the quick take-up valve takes about 15 seconds to reseat after the brake pedal has been depressed, so you should wait at least 20 seconds before you press the pedal while bleeding. If the pedal is pumped too quickly while manually bleeding the system, you may never get the pedal to firm up. On a side note, did you check the level in the master cylinder after every 2 or 3 bleedin procedures? you could have been pumping air right back in the lines if the reservoir runs dry during the bleeding process.

Dec 16, 2013 | Cars & Trucks

1 Answer

2001 Silverado 2500 HD Why Rear brakes don't work after I installed new hydro-boost power booster, master cylinder, calipers, and pads. I bled master cylinder before installing, and brakes beginn


Hello Patricia,

Have you checked the master brake cylinder reservoir for brake fluid loss?

I don't suspect the master cylinder as you have replaced it... but am more suspect of a leaking brake line or fitting which should have
been discovered when you had the system bled.

The only time I ever had a rear brake problem with a 2500 series Chevrolet was due to seized rear brake caliper guide pins...as your calipers are also new that is not your problem.

If your brake pedal feels spongy and travels to the floor board you have air in the system, a brake fluid leak or a failure in the power steering system, such as a broken hose, broken power steering pump drive belt, or failed pump, would result in a loss of pressure to both the hydro-boost and steering.

Find more information here:

. Hydro Boost Power Assist Systems Operation Diagnosis and Repair

Jul 23, 2017 | 2001 Chevrolet Silverado 2500HD

1 Answer

I replaced disc brake pads, rear shoes. wheel cylinder,master cylinder, power brake booster all new. Question: My brake pedal is not solid,goes low to the floor almost. I have bled the master cylinder 1st,...


Check your lines going to the brakes the rubber hose on the 1993 chevy have a tendancy to crack and brake are you using an excess of brake fluid

Sep 12, 2011 | 1993 Chevrolet C1500

2 Answers

Got a 2000 chevy silverado 1500 4wd changed pads and replaced a line think got air in lines cant get any brake pressure to pedal. do i need to take it to shop to fix problem?


No you need to bleed the brakes.
http://www.youtube.com/watch?v=c0IdNb3hEqI
If that doesn't help you need a master cylinder.
Its where the brake pedal is hooked to. and all the brake lines are hooked to it. if you pump the pedal up and leave little pressure on the brake pedal and it slowly goes down with just the wieght of your foot? That is a sighn your master cylinder is bad.

Feb 02, 2011 | Chevrolet 1500 Cars & Trucks

1 Answer

1997 GMC Sierra 5.7 changed master cylinder calipers and brake pads. I have a hard pedal until I turn the truck on and the pedal goes to the floor? Is there something I am missing? I have bled the brakes...


check under your master cylinder,is there another clyinder below with one line in and one line out,if you do I found this is for the Abs to the rear,I had to replace this it was full of air,and did exactly what yours is now

Dec 06, 2009 | 2003 GMC Sierra 1500

1 Answer

97 Chevy Silverado Brake Problem


start bleding again from left to rigt all the way around.

Oct 09, 2009 | 1997 Chevrolet K1500

3 Answers

Replace brakes. now they go to the floor. bled air


When you fixed the brakes, did you take the lid off the master cylinder. I just wonder if you spilled out your brake fluid. The only reason the pedal should go to the floor is if the brake fluid is gone or the master cylinder is not working. Check the fuse. Check the brake fluid level. The pedal only goes to the floor if there is no back pressure in the lines between the master cylinder the lines to the brake pistion on the calipers. Please give me a good ratin and keep me informed.

Jul 07, 2009 | 1999 Cadillac DeVille

1 Answer

1999 Chevy S10 Blazer 4x4. Replacing rear pad's,& Bleeding Breaks


have one person in the blazer pumping the brake pedal and then hold to the floor, crack the bleeder then tighten, release pedal, repeat till all air is out one side at a time, if this does not work then your ABS unit is bad witch if u follow your lines from your master cylinder u will find a black box with a motor on it, or the master cylinder itself is bad, it also can cause u to have no pedal, replace the master cylinder first, most likely cheaper.

Mar 11, 2009 | 1997 Chevrolet S-10 Pickup

Not finding what you are looking for?
1994 Chevrolet C1500 Logo

399 people viewed this question

Ask a Question

Usually answered in minutes!

Top Chevrolet Experts

yadayada
yadayada

Level 3 Expert

76846 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22246 Answers

Ronny Bennett Sr.
Ronny Bennett Sr.

Level 3 Expert

6927 Answers

Are you a Chevrolet Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...