Brake Booster going bad
#1
Brake Booster going bad
I believe my brake booster is going bad which is causing a woosh sound when i pump the brake pedal and causes a fluctuation of engine rpm as i pump the brake pedal (like its causing a vacuum leak. Here are a few video examples. Also when the engine is running and i pump the brakes my rpm will drop about 200 rpm and then cause the engine to run rough for a second or two and then it goes back up. Let me know what you think.
http://s446.photobucket.com/albums/q...t=MVI_0487.mp4
http://s446.photobucket.com/albums/q...t=MVI_0487.mp4
Last edited by jonnyisback; 09-21-2010 at 05:17 PM.
#2
I must of missed it but & didn't hear anything on the video that you linked. Have you checked the hoses? But it is possible to have it leaking.
#3
I have sprayed carb cleaner around all the ends of hoses on it to see if it caused the engine to speed up which it didnt. I have also replaced the vacuum hose which didnt help. The vid has sound for me, you may want to check the volume. I can hear the woosh it makes from inside the cab or under the hood. Sounds like its coming from inside the brake booster.
#4
One way to find out is disconnect the vacuum going to the booster & see what happens. Just remember you will be without power brakes so don't go racing off.
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