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| | | | Joined: Jul 2005 Posts: 227 Wrench Fetcher | | Wrench Fetcher Joined: Jul 2005 Posts: 227 | ok. well just finished hooking up my booster and running new brake lines. got it bled and everything is working... except when i step on the brake pedal it wont return. you have to pull it back out. any ideas? they work great, its just the pedal. i am running the booster off the vacuum line on the front of the carb because there wasnt an outlet on the manifold. could that be the problem? i checked and there is a decent vacuum from the port.
thanks in advance for any help | | | | | Joined: Mar 2004 Posts: 3,068 'Bolter | | 'Bolter Joined: Mar 2004 Posts: 3,068 | Unhook the vacuum source and see how it acts. If the diaphram is bad, it could have vacuum on both sides of the booster, hanging things up.
Scott | | | | | Joined: Jun 2005 Posts: 887 Shop Shark | | Shop Shark Joined: Jun 2005 Posts: 887 | Are you missing the return spring on the pedal? I'm not sure if you need it with the booster, but if so and it's missing you'd have that return problem.
'51 Chevy 1/2 ton w/'62 261, HEI, offy, fentons, dual carter/webbers, t-5 & 12 bolt posi
| | | | | Joined: Jul 2005 Posts: 227 Wrench Fetcher | | Wrench Fetcher Joined: Jul 2005 Posts: 227 | there was no return spring before and it was working fine. actually when the motor is off the pedal does not stick, it will spring back. does that mean the booster is bad? its brand new! | | | | | Joined: Jun 2005 Posts: 1,756 Shop Shark | | Shop Shark Joined: Jun 2005 Posts: 1,756 | I doubt you have enough vacuum to make it work properly. If you can't get a better line to the booster You might try adding a storage cannister in the line?? | | | | | Joined: Jun 2005 Posts: 1,756 Shop Shark | | Shop Shark Joined: Jun 2005 Posts: 1,756 | Just saw one "remote vacuum reservoir" advertised by performanceonline.com $34.00 If you are running a hot cam, this will effect your problem. Maybe I am over enginering the problem but if you have a small diameter booster you still can put the reservour to good use | | | | | Joined: Jul 2005 Posts: 227 Wrench Fetcher | | Wrench Fetcher Joined: Jul 2005 Posts: 227 | looks like there is a port on the intake manifold in the back inbetween the the carb and the dist. cap. will look for that and try that. i would rather not add anything under the hood that is not needed. the sbc has a "RV" cam (so says the PO) so the vacuum should be high enough. from research the booster needs 16 - 23 lbs vacuum. thanks for the info | | | | | Joined: Jul 2005 Posts: 227 Wrench Fetcher | | Wrench Fetcher Joined: Jul 2005 Posts: 227 | ok. still no change when using the port off the rear of the intake manifold. is my booster dead??? any other ideas?
thanks in advance | | |
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