what would be casing my 99 grand am to have no pressure in the brakes? I just got my master cylinder replaced about a year ago. i have also checked for leaks and have found nothing apparent. i did remove my master cylinder to see if there was fluid behind it and there was none. could it be something internally wrong with the cylinder or something else? please help asap.

65

Asked by Mar 02, 2012 at 10:06 PM about the 1999 Pontiac Grand Am 4 Dr SE Sedan

Question type: Maintenance & Repair

4 Answers

107,625

Check the vacuum to the booster.

2,845

What do you mean when you say "no pressure"... Is your pedal high and hard or very low and spongy/unresponsive? High and hard would be a failure in the vacuum power booster as mentioned above. A low, spongy pedal indicates a pressure loss somewhere in the system. Check the fluid level in the master cylinder reservoir. Then with a flashlight, trace the brake lines from the master cylinder down to all four wheels and back along the frame, looking for wet and/or rusted-out sections. If everything looks fine, pull the rear wheels and remove the brake drums and inspect the condition of everything inside. To lose pedal, it would have to be something drastic....but if you had a moderate to badly leaking wheel cylinder, you'd never see it behind the wheel and it would suck your reservoir dry til it pulled air, which would make the rest of your pedal vanish,

1 people found this helpful.
2,845

Also, if your new master cylinder *did* fail, it would be bypassing which would typically give you fair stopping power when you first applied the pedal but it would immediately begin to fade to the floor unless you pumped it for as long as you were applying it.

65

II have checked the booster and it is fine. I pulled the vac hose out and it let out a considerable amount of pressure. The pedal sits where it should it jus barely takes any force to push it down when the car runs. When its off it is still pretty easy to press down. How can I test the master cylinder to see if its the problem?

2 people found this helpful.

Your Answer:

Grand Am

Looking for a Used Grand Am in your area?

CarGurus has 726 nationwide Grand Am listings starting at $1,900.

ZIP:

Pontiac Grand Am Experts

  • #1
    tenspeed
    Reputation
    8,040
  • #2
    Tom Demyan
    Reputation
    1,660
  • #3
    John Saffrahn
    Reputation
    1,640
View All

Related Models For Sale

Used Pontiac Grand Prix
8 Great Deals out of 1,771 listings starting at $800
Used Pontiac Firebird
6 Great Deals out of 667 listings starting at $4,700
Used Ford Mustang
273 Great Deals out of 37,797 listings starting at $1,350
Used Chevrolet Camaro
232 Great Deals out of 27,541 listings starting at $2,800
Used Chevrolet Malibu
465 Great Deals out of 51,838 listings starting at $1,975
Used Chevrolet Impala
448 Great Deals out of 25,776 listings starting at $950
Used Toyota Camry
743 Great Deals out of 73,783 listings starting at $1,195
Used Pontiac Bonneville
334 listings starting at $3,800
Used Nissan Altima
729 Great Deals out of 67,988 listings starting at $1,499
Used Honda Accord
539 Great Deals out of 104,189 listings starting at $950

Used Cars For Sale

2004 Pontiac Grand Am For Sale
167 listings starting at $1,900

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use.