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5.9 Liter CR Dodge Cummins 03-07 Discussion of 5.9 Liter Dodge Cummins Diesels with Common Rail Injection

Brake Hiss

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Old 04-24-2011, 09:49 AM
jsmith89's Avatar
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Default Brake Hiss
My '03 cummins makes a weird hissing sound whenever I really stand on the brake (usually when I'm trying to get my wallet out) As soon as I let off the brake it stops. Sounds like it is coming from under the dash. Any ideas what it might be and is that normal?
 
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Old 04-24-2011, 07:41 PM
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My guess is a leak in the booster
 
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Old 04-25-2011, 03:38 AM
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Low fluid The hydroboost works off the P.S. pump.
 
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