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Old 09-30-2012, 05:12 AM
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Originally Posted by vetteman View Post
Do you feel it's a booster problem when,as I mentioned, that the pedal fully returns when driving the vehicle with vac line unhooked from booster?
Yes, I believe it's a prob w/the booster. The valve I mentioned has a seat that has to hold vacuum, even a broken/weak internal valve spring has the potential to be the problem, but the booster would need to come apart to confirm this- something that's outside the ability of most guys, besides the poit that you shouldn't need to fix a problem not of your making.

Given the info you've provided and the checks you've made, if it's not the booster, I'm at a loss.

It shouldn't cause the problem, but have you checked the vacuum check valve between the engine and the booster?
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