Pre-Power Stroke Diesel (7.3L IDI & 6.9L) Diesel Topics Only

Brakes

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Old

Sep 15, 2004 | 04:14 PM

#1

tazmania18235

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Junior User

Joined: Feb 2004

Posts: 63

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Question

Brakes

`Driving home from work today my brake pedal just went stiff!!!

It will not release the vacuum.. even with engine off pedal is hard as a rock..

I am thinking Power Booster.

. Does this sound right?? I have vacuum when I take hose off of booster. How much vacuum should there be??? If I put my finger over the hiose I feel the vacuum. Master cylinder was replaced about 3 momths ago...
Any help would be greatly appreciated

1985 E-359 6.9 Diesel

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Old

Sep 16, 2004 | 06:10 PM

#2

andym

Post Fiend

Joined: Mar 2002

Posts: 19,402

Likes: 38

From: Bonita Springs FL

Sounds like your vacuum pump is fine, I'd look at the power booster.

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Old

Sep 16, 2004 | 07:55 PM

#3

85capr

Freshman User

Joined: Sep 2004

Posts: 46

Likes: 0

From: baltimore

check the check valve just to make sure its not something stupid before you replace the booster

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