HARD pedal
September 12th, 2016, 05:17 PM
#1
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Join Date: Aug 2016
Posts: 73
HARD pedal
Having a problem with brakes on my 67 delta custom. Pedal is very hard and feels as if i dont' even have power brakes. Car is hard to stop unless i really lay on the pedal. Brake booster is new as is the master cylinder. Brakes on all 4's are good and rears have new springs on the self adjusters. Anybody know what the vacuum should be? I can pull the hose out of the booster and not get much of a whoosh.
September 12th, 2016, 06:25 PM
#3
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Join Date: Oct 2004
Location: Forest Ranch Ca.
Posts: 7,714
Are you sure all 4 wheels are stopping?Could the rears be the only wheels that are working?
You might try to slide to a stop on gravel and see if all four wheels are trying to lock up. but as mentioned above it very well could be a bad new booster.... Tedd
You might try to slide to a stop on gravel and see if all four wheels are trying to lock up. but as mentioned above it very well could be a bad new booster.... Tedd
September 12th, 2016, 06:34 PM
#4
Connoisseur d'Junque
Join Date: Sep 2010
Location: The Hudson Valley
Posts: 21,183
425 rough idle
I'm having issue with really rough idle on my 67 olds, 425 4bbl. When it's cold it runs perfect, and no problem driving and cruising along after it's warmed up but when i come to light or idle for any reason it idles very rought as if it were bout to stall.
I'm having issue with really rough idle on my 67 olds, 425 4bbl. When it's cold it runs perfect, and no problem driving and cruising along after it's warmed up but when i come to light or idle for any reason it idles very rought as if it were bout to stall.
- Eric
September 12th, 2016, 07:35 PM
#5
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Thread Starter
Join Date: Aug 2016
Posts: 73
[QUOTE=MDchanic;953002]Methinks there may be a relation between these two threads, no?
- Eric[/QUOTE
Other than the obvious (they're both mine). Is this a riddle??
Are you thinking vacuum leak may be the relation between the 2???
- Eric[/QUOTE
Other than the obvious (they're both mine). Is this a riddle??
Are you thinking vacuum leak may be the relation between the 2???
September 13th, 2016, 07:31 AM
#8
Old(s) Fart
Join Date: Mar 2007
Location: Northern VA
Posts: 47,265
There is a quick-and-dirty test. Simply disconnect the vacuum hose from the booster and plug it. Obviously you will no longer have power brakes, so be careful. If the engine runs better now, you have a leak in the booster - replace it. If the engine runs the same, fix that problem, as the low vacuum is causing the booster issue.
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