1996 Taurus master cylinder

[smellywetdog]

I have a 96 Taurus 3.0v6.I replaced the master cylinder last month because the pedal was dropping to the floor.I bled the system well,and everything seemed to be working well.Now I apply the brakes and one minute it goes to the floor,the next I get what seems like a full application even if ive just gently stepped on the pedal.It is like the abs is kicking in as the brakes vibrate and carry on like a Mariochi Band on slippery surfaces.Ive rebled the system,and checked for leaks anywhere ,and found nothing.Also,if I am at a light with the brakes on,I can sometimes feel the pedal start to sag again.whats the deal here?Is it something in the abs,or is there something additional I must do when working on a car with abs?Any help would be appreciated.Patrick

[mechhound]

I would say your new master cylinder is defective. Was it new or rebuilt? The part about it suddenly going to the floor shouldn't happen. The part about sagging at a stop light seems to be normal for this vintage of Ford vehicles. Anyway as I see it, you got a defective replacement master cylinder.

[smellywetdog]

Originally Posted by mechhound

I would say your new master cylinder is defective. Was it new or rebuilt? The part about it suddenly going to the floor shouldn't happen. The part about sagging at a stop light seems to be normal for this vintage of Ford vehicles. Anyway as I see it, you got a defective replacement master cylinder.

thank you mechhound,I was kinda thinking the same thing.Oh and by the way ,it was a rebuilt mastercylinder from NAPA.The clincher now will be because I cant locate the reciept,will they honor an exchange afterall.Im hoping so as Ive bought alot of parts from them.thanks again for your help

[mechhound]

Originally Posted by smellywetdog

thank you mechhound,I was kinda thinking the same thing.Oh and by the way ,it was a rebuilt mastercylinder from NAPA.The clincher now will be because I cant locate the reciept,will they honor an exchange afterall.Im hoping so as Ive bought alot of parts from them.thanks again for your help

I wouldn't think not having the receipt would be a problem. Most places like that use electronic bookkeeping now days. Especially beings you do a lot of business with them.

[inafogg]

should be no problem with return but get a new one they are/were $5 more
when i replaced one over the summer

[inafogg]

and bleed it before you install it!!!!

[smellywetdog]

well I called them today and they said no worries,bring the old one back and switcheroo will happen.Ill keep you updated on my progress if interested.