[yeldir11]

hi all! this is my 1st visit so not sure how it works, but here goes. my brakes are almost new, but when you push the pedal it is very stiff, as if power assist isn't working. I can't find a power assist unit on the car, and I obviously don't know where it is. any help out there?

 

[chuzz]

Welcome to Allpar. Perhaps your check valve on your power brake booster is bad. We really need more information as to try to help you solve the problem. Did you replace just the front pads or both the pads and rear brake shoes? Was the system bled to get rid of any trapped air? You may have a defective master cylinder. There are a lot of possibilities and we'll need to know just what was done to your car and if the pedal felt like that before the brake job. Tell us exactly what was done.

 

[valiant67]

I don't think there is a conventional (vacuum operated) brake booster on that system. Some of the early ABS systems used the same hydraulic pump for the ABS and the regular power brake boost and all these units (Bosch, bendix and Teeves) tend to be problermatic as they get older.
It looks to be a Teves system on the TC. Your options are to find and fix the problem in the ABS system (probably the pump or some other related hydraulic piece) or to retrofit conventional vacuum operated power assit brakes to the car:
http://www.allpar.com/fix/brakes/tc-brake-booster-replacement.html

Also worth a look:
http://www.allpar.com/forums/topic/144693-91-chrysler-tc-by-maserati-power-assist-for-brakes-quit-working/