lowdown Posted October 31, 2010 Share Posted October 31, 2010 I hit the brakes and there is no vacuum assistance. At idle without hitting the brakes the engine sounds fine, if I hit the brakes the idle goes up. Thus I am assuming that the vacuum diaphragm has ripped or leaking. Could it be anything else before i take it out of my other 72 and put it in my daily. This would give me a excuse to get the Beta Motorsports one for my LS1 project Z What happened: Well here i am doing 85MPH on a 1 lane transfer lane from one highway to another, hit my brakes to slow down to not hit a mustang and find my brakes are no longer assisted. (took a sec to figure it out after the original panic) 15 years ago would have hit my brakes a lot later, which would have been bad! Thanks Phil Quote Link to comment Share on other sites More sharing options...
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