Just had my master cylinder and brake booster replaced...now i drive and 10-15 minutes into the drive, the brake pedal gets stiffer, and moves less...also brakes seem to be dragging...does this sound like a defective booster? constantly applying pressure onto the master cylinder? im not to sure, would like some help tho!

 

Now this is not for sure....BUT it sounds like you may have a stuck caliper. Have you checked them to see. I have one right now I am needing to fix.

Take the wheels off, and have someone pump the brakes as you watch the caliper. If both top and bottom are sliding when they push the brakes they are ok, of one side sticks while the other slides you need to rebuild your caliper.

If they both slide normally then you may be on the right track, just something really easy to check before you tear off all the stuff and have to bleed again ect.

 

Ill check, but i dont know why it would do that, didnt have this problem b4 i replaced the mc and booster...

 

see my brakes feel really soft, like I need to replace my stuff, but I think alot has to do with my stupid caliper. Just something to check.

 

Something to look into, althought im almost positive thats not my problem...thanx tho!

 

Sounds like the booster to me. I assume the vacuum line is hooked up right?

There's are threads on the rod coming through the firewall (don't know what it's called) from the booster. You can adjust when the pedal engages the booster. Maybe try backing those out slightly and see what happens......in a safe place, of course

 

Ill check into that as well...ive heard this is a possibility...im gonna guess that when it was put on, they didnt compare the 2 and put the threads on the new one to the same size as the original..if u follow

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by sleepin91teg &raquo;</TD></TR><TR><TD CLASS="quote">Ill check into that as well...ive heard this is a possibility...im gonna guess that when it was put on, they didnt compare the 2 and put the threads on the new one to the same size as the original..if u follow</TD></TR></TABLE>
Do you have the old booster, so you can check visually?

What a PITA......swapping boosters

 

no, booster was exchanged for core price...DRR

 

Have you checked your rubber brake lines?

I have a problem like this on my '83 Civic.

Brand new M/C, brand new booster, brand new calipers.

I'll be driving fine for a few minutes and then my brake pedal will get stiffer and stiffer. And my brakes will be at full lock.

Everything checks out okay, and everything is new except the rubber lines and the prop valve.

I hope it's one of those on my car. One of my experienced buds says he's 95% sure that it's the rubber lines.

I haven't tried replacing them yet because nobody carries them and Honda wants a freakin fortune for them!

It's something to check out

 

Oh, and BTW...my car had the exact same problem before I replaced the MC/Booster/Calipers.

 

i almost took your idea into consideration, but i didnt have this problem b4 i replaced the mc and booster, so im somewhat positive that the problem lies within one of the two