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For awhile now I have heard a swoosh sound while pressing on the brake pedal, I never thought much of it until recentley. I was stuck in heavy traffic on the freeway and had to stop frequentley, however my jeep wouldn't always stop quickley...
http://www.automotiveforums.com/t890461-is_my_brake_boo...
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hard brake pedal is the most obvious sign only way i know to test a booster, is to turn engine off. use brakes several times till pedal is hard. then with brake applied,start engine. the brake pedal should then soften.if the pedal stays har...
http://wiki.answers.com/Q/What_are_symptoms_of_a_bad_po...
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What are the symptoms of a bad power booster? ... Shut off the engine. Depress the brake pedal a few times to evacuate the booster Apply a steady pressure to the pedal and start the engine. The pedal should fall slightly.
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www.mbmbrakeboosters.com/F.A.Q.-S/FAQs-Brake-Boosters.h...
www.mbmbrakeboosters.com/F.A.Q.-S/FAQs-Brake-Boosters.html
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A failed brake booster will make the pedal way too stiff but will not produce the symptoms you describe. What you are describing sounds like a problem with the master cylinder or that the brake bleeding went wrong and ... sounds like you still have air in the lines, when a booster goes bad, the brake pedal is hard to push.
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answers.yahoo.com/question/index?qid=20071223091711AAcg...
answers.yahoo.com/question/index?qid=20071223091711AAcgh6l
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but I was going to suggest an alternative quick testing method: remove the vac line at the booster end, and while using your calibrated thumb to plug it, have an assistant start and idle the car. You then can check for flow, by uncorking the hose and observing a ... Subject: [alfa] Diagnosing a bad brake booster...
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www.digest.net/alfa/archive/v10/msg02846.html
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Re: how to tell if brake booster or master cylinder is bad ... The symptoms you are describing definately sound like it could be your master cylinder. I is a failure in the vehicles brake hydraulic system which consists not only of the master cylinder but of the calipers, wheel cylinders, at least one proportioning valve...
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cr4.globalspec.com/thread/22457/How-to-Tell-if-Brake-Bo...
cr4.globalspec.com/thread/22457/How-to-Tell-if-Brake-Booster-or-Master-Cylinder-is-Bad
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Watch the vac guage as a friend depresses the brake pedal. It should dip as the pedal is depressed and return to the base reading. If it drops slowly, but returns, you have a blockage/collapse in the vac line. If it falls and does not return, you have a torn diaphram in the booster.
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www.type2.com/library/brakes/vacboo.htm
www.type2.com/library/brakes/vacboo.htm
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what are the symptoms of a bad brake booster? Lincoln vs Cadillac Forum - The ultimate resource for Lincoln LS and Cadillac CTS owners. We feature discussion forums, photo galleries, how to articles, industry news and much more - all for FREE. ... ok, then its definitely NOT a bad brake booster.. i can bleed the brakes,
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www.lincolnvscadillac.com/Lincoln-cadillac-archive/topi...
www.lincolnvscadillac.com/Lincoln-cadillac-archive/topic/17483-1.html
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It sounds to me like you have air in the system.If you have ABS it's a whole other can of worms,and not live worms either,long dead stinkin' worms. Try a pressure bleeder and force brake fluidup through the caliper into the master cylinde...
http://mustangforums.com/forum/general-tech/227884-brak...
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