pump brakes a few times to get a hard pedal with motor off. Push brake and start car, brake should sink a little, not go to floor. Stop car and wait about 30 seconds. push brakes again, you should feel the assist, ie. it should go down a few like you were idling. If it doesnt, you have a leak somewhewre, it could be as simple as the vacuum one way valve thats pushed into the brake booster, a cheap part to fix. It could be an air pocket somewhere but if you bled them that is not likely. Sometimes you can hear a brake booster hissing when you put the brakes on. a booster is not that hard to replace, just getting it in and out may be a hassle. I did my Suburbans for less than 120 bucks but that was a truck...with a large engine compartment. Hardest part was getting the nuts loose behind the dash.
Hi,
What is that part called exactly? I believe I need that part, but have heard different names. Thanks.