Replace power brake booster - 1999 Ford Contour

I believe that your vehicle has whats called hyrdoboost for your power brakes instead of a vaccuum booster. As such, your brake booster and powersteering pump work together check the brake booster for leaks or failure

DTC C1100 00: Brake Booster Vacuum Sensor Performance .
Do you know what the brake booster is ?
Circuit/System Description
The electronic brake control module (EBCM) provides a power 5-volt reference to the brake booster vacuum sensor. The brake booster vacuum sensor converts the change in vacuum levels in the brake booster into a voltage signal. This signal is sent to the EBCM. The voltage signal ranges, from 0.13 to 3.30 volts depending on vacuum levels. The low reference is the return side of the sensor to ground.
Conditions for Setting the DTC
?€¢
Voltage at the brake booster sensor signal output to the EBCM falls outside the 0.13 to 3.30 volts range for more than 200 milliseconds.

?€¢
The power 5-volts reference is shorted to ground or battery positive.

Action Taken When the DTC Sets
The red BRAKE Warning indicator turns ON.
Circuit/System Verification
DTC C1100 will set as result of power brake booster vacuum sensor or circuit failure, test for power and ground circuits to the EBCM.
?‡'
Repair the power or ground circuits.

do you know what

Auto Repair Tips : Brake Booster Leak - YouTube

? 1:48
https://www.youtube.com/watch?v=LQj6jUn4-U0
Feb 10, 2012 - Uploaded by ehowauto
The hydraulic brake booster is bolted behind your hydraulic master cylinder ... Learn how to fix a brake booster leak with help from ... ... Published on Feb 10, 2012 ... vehicle, it will reward you by driving smoothly and safely in the years to come. ... How to replace a Power Brake Vacuum Booster (1985 Jeep ...

F350 Brake Pedal Hard to Press, Brakes Don't Work ...

? 6:07
https://www.youtube.com/watch?v=SKWQTQgN334
Apr 27, 2014 - Uploaded by PatricktheSalvageGuy

Here's a link to replacing your power brake booster. Repair Guides Brake Operating System Power Brake Booster AutoZone com

I had my power brake booster go bad and I replaced mine as well as bleed the brakes that when I went and tried them out 'I slammed on my breaks early before getting to close to the light' that my car left skid marks all over that road because the brakes worked like power brakes should and yours sound like your booster was installed wrong or the pads are bad or you didn't bleed all the air out of the line. Your problem you described was like it felt before I replace brake booster ie lousy non power brakes when I had power brakes.

Brake booster vacuum hose , inspect that, if the hose is good then brake booster has went bad.

Click here Jeremy to see how to replace brake booster.

Check the help link below and follow the procedure:----

How to replace Brake Power Booster?

http://repairhelpcenter.blogspot.in/2012/02/how-to-replace-brake-power-booster.html

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Where is Power Brake Booster located on Car?

http://howtobyme.blogspot.com/2011/12/where-is-power-brake-booster-located-on.html

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How to Replace Power Brake Booster on 1996 GMC Jimmy?

http://schematicsdiagram.blogspot.com/2011/12/how-to-replace-power-brake-booster-on.html

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These will help.
Thanks.

This one I can be fairly certain of. It sounds like a rip in the vacuum power brake booster diaphram. Usually you just replace the whole power brake chamber, which includes the diaphram. You have to first remove the 2 bolts holding the master cylinder to the larger booster chamber, but you don't normally have to open any brake lines.
When replacing, make sure the brake pedal rod goes down the center of the new booster, and that there is sufficient clearance or freeplay in the pedal rod when done. (like .1" is all you need)
Should not have to bleed after done.