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07-30-2009, 05:09 PM
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#1 |
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Registered User
 
Join Date: Mar 2009
Location: Tucson AZ
Posts: 187
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Power brake problems
So I just did a swap on my 71 c10 to power brakes. I got every thing put on and i started the truck up and still have a hard pedal. engine idles fine but i pulled the check valve and it started running rough. Its not making a whinning sound. I have the vacuum coming off the t on the back of the intake. feels the same as manual brakes. any suggestions would help greatly.
Last edited by justtime520; 07-30-2009 at 05:14 PM. |
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07-30-2009, 05:34 PM
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#2 |
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Registered User
Join Date: Jan 2006
Location: Take Off
Posts: 1,908
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Re: Power brake problems
Is the booster new? May want to take a Mityvac to it and confirm that it is holding vacuum and not leaking. Also, does the master have to be sealed well against the booster? I remember seeing master to booster seals/gaskets out there. Also, is the engine pulling enough vacuum at idle to operate that booster? I would take a vacuum guage and hook it up to that T you have and make sure you have sufficient vacuum. Also, confirm that you have the T hooked up to full manifold vacuum and not some other type of vacuum source such as timed manifold vacuum or ported vacuum.
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