dalejrfan88
Member
Hey guys! I picked up an 03 jetta about 2 months ago to replace my current daily driver. This is my first VW, but I am not totally new to working on these things since my friend has had one for the past 7 years or so. Anyway, lets get down to it. I have been slowly working on this car to get it through inspection and have run into a problem.
With the engine off, my brake pedal seems fine, its firm and will hold pressure. After starting the engine, the pedal immediately sink to the floor. I did not have this problem when I purchased the vehicle, so it must be something I created. I have done insane amounts of bleeding, both the old school way, and using VCDS to purge the abs unit. I have gotten a lot of air out of the brakes, but there has been no difference in pedal feel. I have ran almost 2 liters of fluid through this thing, so I really don't think there is any air trapped in the system. I am wondering if I just got a bad master cylinder? Any help would be greatly appreciated!
"Parts" I've replaced
-flushed the brake fluid (motive bleeder)
-replaced 2 calipers ( on because the bleeder screw snapped off, the other was making odd clicking noises when I would push on the brake)
-replaced the master cylinder
With the engine off, my brake pedal seems fine, its firm and will hold pressure. After starting the engine, the pedal immediately sink to the floor. I did not have this problem when I purchased the vehicle, so it must be something I created. I have done insane amounts of bleeding, both the old school way, and using VCDS to purge the abs unit. I have gotten a lot of air out of the brakes, but there has been no difference in pedal feel. I have ran almost 2 liters of fluid through this thing, so I really don't think there is any air trapped in the system. I am wondering if I just got a bad master cylinder? Any help would be greatly appreciated!
"Parts" I've replaced
-flushed the brake fluid (motive bleeder)
-replaced 2 calipers ( on because the bleeder screw snapped off, the other was making odd clicking noises when I would push on the brake)
-replaced the master cylinder