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Hi Im David, thanks for visiting the site. did you bench bleed the master cylinder before installing?
looks like their having issues with payment for the call?
have you tried bleeding the brakes with the car running?
try bleeding the brakes with the engine running. believe me it has solved this problem many a time
regular manual bleed. person in drivers seat..etc..etc..
let me know how it goes... next time you replace a master. just take some extra time and bench bleed it before installing. makes life a lot easier.
do you still need assistance?
ok. you're sitting in the driver seat. you pump the brake pedal and it feels good. you start the vehicle and the pedal goes to the floor. during bleeding you had straight fluid. does it travel as far as it did before you bled them with a running engine?
ok, im gonna pull a schematic of the system.......
question, drums or rotors on the back?
and you're bleeding from rr/rl/fr/fl right?
sorry, had to ask
is the master cylinder a single bowl or double?
ok..........now as you are aware, at least here in the northeast, when a customer comes in with a rusted thru brake line, i recommend replacing all of them because 9 out of 10 times another line will rupture in the process of bleeding. what i am getting at is, check the condition of the remaining rubber hoses/lines. feel them if they are spongy or deteriorated. they can actually be swelling causing excessive travel.
it is very difficult to determine, but if they are bad enough you should
another question when you replaced the m/c did you disconnect any lines going to the abs module?
ok. well if there is no noticeable/questionable other problems with the remaining rubber, all i can say is bleed them a few more times. i have had a few vehicle that it took a good 10-12 bleeds. i have no ides why either.
did you happen to pull the vacuum hose off of the booster to access the m/c???
calling it a night brother.........its almost midnight here.
what about the booster check valve?
was the m/c a reman or new?
put a new one in.
i run into bad remans alot
did you try a new one?
Different expert here.
do you still need help?