Car Stalls when I hit Brakes Hard, Mushy Brakes

[90TalonTsiPa]

So lil quick background -1990 Eagle Talon Tsi AWD- Replaced Pass. Side Rear Caliper, Rotors, Pads, Replaced Alt., Replaced Batt. w/ Optima Red Top, IC Tested it as per VFAQ's, Installed MBC, Intake pipe w/ K&N, and Boost Gauge only mods.

First Problem - Keep in mind i've never been low or LOST any brake Fluid!!! Back Pass side caliper was bad so i replaced, ok no problem, Brakes were squishy and very hard to stop, so i Bled Brakes again and again, and again, still getting air in my brakes, I can bleed them with a 1 man bleeder and the brakes will feel PERFECT, but after a while or the car sits, brakes feel squishy again. So i bled them a last time and they ride ok but not great *(they stop), wasn't sure if this is a Master Cylinder Problem??- but then why aren't BOTH back brakes bad (i.e. Getting Air and not fluid) the Drivers side bleeds perfect, and soo does the Back Pass side sometimes but I bled it yestereday till no bubbles checked again today and more bubbles. The Master Cylinder only knows Front and Back right?, maybe a PROP. Valve problem?? But if the line was clogged i wouldnt' even get air right???

2nd problem or do these problems relate (Vacuum)?...

When i come to a stop, my car stalls, not all the time if I ease into the stop it's ok, if i am 30-40 mph and come to a red light quick, Car stalls, Second Test - I am driving at 30-40mph drop it into Neutral and Brake Car will die and stall out.

Vacuum Leak somewhere??? I pressurized system didn't SouND like any leaks..?any Suggestions anyone???

-Ray

 

[Agent Ezzard]

What are your vacuum readings at idle?

 

[90TalonTsiPa]

I just bought this car about 3 months, ago soo no idea when or IF these were ever checked or changed... also just bought a Volt Meter yesterday soo if theres Tests Please let me know, OHMS Resistance Checking etc.

Vacuum is around 20....., 25 while driving for vacuum boost is around 13-14 psi,

Update did some research on the forums, came up with list of things to check, FIAV
TPS, ICS, BISS, Some Small white connector to the Left of my Cruise Control

- BISS is Messed up looks stripped and Turned ALL The way IN or Down, prob part of the problem

- FIAV, well the two coolant lines were off, but i connected them that seemed to help with the real Fast Idle and Idle Surge , of 1500 RPMS... side note also replaced the Coolant Temp sensor, Coolant ECM Sensor, that too helped w/ Idle Surge.

TPS/ICS is there a check i can do for these?? Ohms resistance check?

And I'll look for the small white connector -

 

[Agent Ezzard]

www.vfaq.com

 

[90TalonTsiPa]

Thanx alot for the help on AIM,

So will get brakes checked at PepBoys (free?)

also:
check ISC http://dmtalon.v8eaters.com/ISC.html
check BISS http://www.vfaq.com/mods/BISS-1G.html *get new one and try to remove stripped one
check TPS http://www.plymouthlaser.com/tps.htm

could be Brake booster problem??

 

[90TalonTsiPa]

Does anyone think this is Def. A Vaccum issue, because of the Brake Booster or
is this more of a Brake Issue / Master Cylinder causing air to get in the lines or
is this a Idle problem / TPS/BISS/ICS which doesn't explain the recurring air and mushy brakes...


anyone?? just wondering before i dump money in the wrong place

 

[2.4 turbo Hyped]

Sounds like a brake booster problem to me. Something inside the booster sounds like its leaking.