possible vacuum pump failure, need opinions - Ford Powerstroke Diesel Forum
Please Visit our Site Sponsors
Powerstroke.org is the premier Diesel Truck Forum on the internet. Registered Users do not see the above ads.
LinkBack Thread Tools Display Modes
Old 10-20-2010, 04:30 PM
Powerstroke.org Fanatic

Join Date: Nov 2009
Posts: 91
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
possible vacuum pump failure, need opinions

If I step on the brake coming to a stop sign, my brakes work fine. If I release the pedal and step again, the pedal gets harder (like the truck is off) and the brake light comes on. Once I drive away, after about 5-10 seconds, the brake light will go off and I will have brakes again (until I stop or pump the brakes).

If I park the truck (with vacuum pressure in the booster) and let it sit for 30 mins, I can step on the brakes (truck off) and they are normal (granted the pedal firms after 1-2 pumps, but that's normal for a non-running truck). I do not think I have a leak.

I took the vacuum cleaner out of the house, and put it on the booster. The booster worked normal and the brakes felt fine. This leads me to believe that its not the booster.

So, what do you think? Booster or pump? I need to tow my Jeep this weekend and need to get it fixed!!! I already have a new vacuum pump, but don't have enough money to throw around trying to get the right part. My suspicion is the pump, but I want another opinion. I will be diving into this tomorrow so I need your input!!!
Reply With Quote Quick reply to this message
Sponsored Links
Old 11-30-2010, 04:02 AM
Powerstroke.org Fanatic

Join Date: Feb 2006
Location: arizona
Posts: 114
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
I Know its two months too late but I have the same problem. so heres a bump.
Reply With Quote Quick reply to this message
Sponsored Links

Quick Reply

Register Now

In order to be able to post messages on the Ford Powerstroke Diesel Forum forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.
User Name:
Please enter a password for your user account. Note that passwords are case-sensitive.
Confirm Password:
Email Address
Please enter a valid email address for yourself.
Email Address:


Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.

Thread Tools
Display Modes

Posting Rules
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

All times are GMT -8. The time now is 08:20 AM.

Powered by vBulletin® Copyright ©2000 - 2015, Jelsoft Enterprises Ltd.
Search Engine Optimization by vBSEO 3.6.1
Garage Plus, Vendor Tools vBulletin Plugins by Drive Thru Online, Inc.