brake booster check valve
05-07-09, 10:09 AM
#1
Junior Member
Thread Starter
Join Date: Dec 2006
Location: Atlanta
Posts: 48
Likes: 0
Received 0 Likes
on
0 Posts
brake booster check valve
I'm having brake booster issues (hard pedal), and I read to check the check valve on the vacuum line for correct operation. However, I don't have a check valve. Looking at other engine bay photos it seems that some cars have this valve while others do not. Why is this?
My car is an 85 gsl. I know my brakes worked fine without the check valve and with the stock nikki, but this issue arose after switching to a weber sidedraft. The brake booster line is hooked up to a tap on the manifold.
My car is an 85 gsl. I know my brakes worked fine without the check valve and with the stock nikki, but this issue arose after switching to a weber sidedraft. The brake booster line is hooked up to a tap on the manifold.
05-07-09, 10:49 AM
#2
The check valve is hidden inside of the rubber hose, just off of the booster. Blow one way in the hose, air passes, the other way it doesn't. Check your booster line for leaks, that can cause a hard pedal. Btw, you did connect the booster line up to the larger 3/8" barb and not the 1/8" barb on the new intake.
05-07-09, 11:35 AM
#3
Moderator
iTrader: (3)
Join Date: Mar 2001
Location: https://www2.mazda.com/en/100th/
Posts: 30,827
Received 2,595 Likes
on
1,843 Posts
yep, valve is in the hose.
since you're in there make sure the booster holds vacuum too, mine did not. and the valve should get cycled a few times, they can be intermitant especially when its really cold or really hot
since you're in there make sure the booster holds vacuum too, mine did not. and the valve should get cycled a few times, they can be intermitant especially when its really cold or really hot
05-07-09, 03:57 PM
#5
Moderator
iTrader: (3)
Join Date: Mar 2001
Location: https://www2.mazda.com/en/100th/
Posts: 30,827
Received 2,595 Likes
on
1,843 Posts
05-07-09, 04:23 PM
#6
Hey j9fd3s what are the symptoms if the brake booster doesn't hold vacuum? No pedal feel/hard pedal feel?
Sorry for deterring from the original question O.P. but I hope this is relevant to others doing future searches with booster failure symptoms.
Hope you get your booster to work with your new intake though.
Sorry for deterring from the original question O.P. but I hope this is relevant to others doing future searches with booster failure symptoms.
Hope you get your booster to work with your new intake though.
Trending Topics
05-10-09, 03:23 PM
#9
Moderator
iTrader: (3)
Join Date: Mar 2001
Location: https://www2.mazda.com/en/100th/
Posts: 30,827
Received 2,595 Likes
on
1,843 Posts
Hey j9fd3s what are the symptoms if the brake booster doesn't hold vacuum? No pedal feel/hard pedal feel?
Sorry for deterring from the original question O.P. but I hope this is relevant to others doing future searches with booster failure symptoms.
Hope you get your booster to work with your new intake though.
Sorry for deterring from the original question O.P. but I hope this is relevant to others doing future searches with booster failure symptoms.
Hope you get your booster to work with your new intake though.
Thread
Thread Starter
Forum
Replies
Last Post
trickster
2nd Generation Specific (1986-1992)
25
07-01-23 04:40 PM
Frisky Arab
2nd Generation Specific (1986-1992)
13
08-18-15 05:30 PM
