Quote:
Originally Posted by uwanna
I had an identical symptom on my '80 SC. Tried everything with no luck, till I changed out the master cylinder. Voila! had super brakes once again.
your problem may be something else, but sounds like you've tried everything else!
EDIT: just reread your post and saw you replaced the MC, maybe the new one is defective. Just guessing.
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Your problem is PRECISLY the problem I had on my car. Everything you have mentioned about not being able to do an agressive stop happened to me. I know exactly what you mean about feeling a "hard stop" in the pedal under hard braking. I mentioned that I had replaced the MC, but neglected to also mention that I replaced the power booster as well! In fact I bought a complete unit, MC, booster on Fleabay and all still assembled. Installed, and good as new! I initially thought it must have been the MC that fixed it, but now I'm sure it was the power booster. Given everything you have done, I would bet you also have a faulty power booster unit.
As an aside, I have seen complete units on sale recently on Fleabay from the several Pcar dismantlers that sell there. Here is one from the same guy I bought mine from. I have bought many parts from this guy and have been very pleased with value and fast shipping. (no connection, just happy customer) This is a relisting, because it went unsold at $49.00 !!!
http://cgi.ebay.com/ebaymotors/ws/eBayISAPI.dll?ViewItem&item=200453681874