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.

45

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

96,075

Check the vacuum to the booster.

2,455

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 out of 1 people think this is helpful.
2,455

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.

45

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?

1 out of 1 people think this is helpful.

Your Answer

Add photo

Related Questions

Grand Am

Looking for a Used Grand Am in your area?

CarGurus has 1,256 nationwide Grand Am listings starting at $950.

ZIP:

Search Pontiac Grand Am Questions

Pontiac Grand Am Experts

#1 tenspeed
tenspeed
Reputation 7,560
#2 John Saffrahn
John Saffrahn
Reputation 1,590
#3 Tom Demyan
Tom Demyan
Reputation 1,410
View All

Related Models For Sale

Used Pontiac Grand Prix
20 Great Deals out of 2,874 listings starting at $1,995
Used Pontiac Firebird
8 Great Deals out of 724 listings starting at $1,800
Used Ford Mustang
368 Great Deals out of 46,982 listings starting at $1,500
Used Chevrolet Impala
504 Great Deals out of 29,114 listings starting at $1,100
Used Honda Accord
707 Great Deals out of 87,166 listings starting at $699
Used Chevrolet Camaro
150 Great Deals out of 32,901 listings starting at $1,995
Used Chevrolet Malibu
798 Great Deals out of 81,362 listings starting at $1,500
Used Nissan Altima
842 Great Deals out of 78,891 listings starting at $1,677
Used Toyota Camry
791 Great Deals out of 89,577 listings starting at $950
Used Pontiac Bonneville
544 listings starting at $3,699
Used Honda Civic
502 Great Deals out of 87,905 listings starting at $1,499

Used Cars For Sale

2004 Pontiac Grand Am For Sale
330 listings starting at $1,995
2002 Pontiac Grand Am For Sale
144 listings starting at $950