Team Chevelle banner
Cancel

I think I've had a vacuum leak for the last 8 years

1462 Views 4 Replies 3 Participants Last post by  acny1973, 
A
I watched an episode of "Muscle Car" a week or 2 ago and he put a vacuum pump on a brake booster. He showed that you should be able to get a vacuum reading. It won't pump up quickly like a canister, but after at most 20 pumps, you should get it to hold some vacuum. well mine holds no vacuum no matter how many time I pump it. Looks like I have a bad booster. That looks reasonably easy to change, but how much do you guys think this has been throwing off my A/F and vehicle performance?
Reply
Save
Like
1 - 1 of 5 Posts
O
If your brake booster is bad, I would think you would have a hard pedal.

Also, if your booster is good, it will hold vacuum for a long time, providing the check valve and grommet are good. Pull the check valve out of the grommet in the booster, you should hear the air rush in.

The brake pedal rod has to be adjusted correctly for it to work properly also.
Reply
Save
Like
1 - 1 of 5 Posts
This is an older thread, you may not receive a response, and could be reviving an old thread. Please consider creating a new thread.
Team Chevelle
A forum community dedicated to Chevrolet Chevelle owners and enthusiasts. Come join the discussion about restorations, builds, performance, modifications, classifieds, troubleshooting, maintenance, and more!
Full Forum Listing
Explore Our Forums
Bench Racing Performance Engine Body Shop Chevelle Tech
Top