RedZedACT Posted January 25, 2011 Share #1 Posted January 25, 2011 Guys and Gals, I looking for some help on why my 76 260 revs up when the break pedal is applied and the break pedal is real hard.....Thanks in advance for any ideas.Roo Link to comment https://www.classiczcars.com/topic/38365-engine-revs-when-breaks-applied/ Share on other sites More sharing options...
pwd Posted January 25, 2011 Share #2 Posted January 25, 2011 Have you measured the engine vacuum when idling and when the brakes are applied? Link to comment https://www.classiczcars.com/topic/38365-engine-revs-when-breaks-applied/#findComment-343309 Share on other sites More sharing options...
sam280z Posted January 25, 2011 Share #3 Posted January 25, 2011 Most likely cause is your brake booster diaphragm is leaking. Link to comment https://www.classiczcars.com/topic/38365-engine-revs-when-breaks-applied/#findComment-343310 Share on other sites More sharing options...
RedZedACT Posted January 25, 2011 Author Share #4 Posted January 25, 2011 Thanks Sam I will go ahead and check that out. Link to comment https://www.classiczcars.com/topic/38365-engine-revs-when-breaks-applied/#findComment-343312 Share on other sites More sharing options...
RedZedACT Posted January 25, 2011 Author Share #5 Posted January 25, 2011 Will do the checks on that and see what i come up with... thanks Roo Link to comment https://www.classiczcars.com/topic/38365-engine-revs-when-breaks-applied/#findComment-343313 Share on other sites More sharing options...
LeonV Posted January 25, 2011 Share #6 Posted January 25, 2011 Your brake booster is dead, time for a new one. Link to comment https://www.classiczcars.com/topic/38365-engine-revs-when-breaks-applied/#findComment-343329 Share on other sites More sharing options...
Yarb
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