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Old 10-07-2016   #1
USAFPILOT
 
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Default Sticking Brakes

Not sure which one or how, but after a while driving around I will notice my brake pedal become rock hard up high and that my car won't roll back if stopped on a hill. I can drive and if it cools down it goes back to normal. I was thinking about taking it up to brake check, but figured I'd see what y'all think first.
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Old 10-07-2016   #2
GOLDCYLON
 
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Default Re: Sticking Brakes

Quote:
Originally Posted by Dynomite View Post
Brake booster issues.
Maybe vacuum leak to brake booster.


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My thoughts as well. GC
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91 WHITE/BLACK #2014. 380 P&P&PCed,Ported Heads, Jeal Long tubes, Corsa Exhaust/FIKSE FM-5s /LED TLs, LED Headlights, Front Wilwood 6 piston narrowlite calipers and rear Wilwood caliper street shop mod,CNCed Coolant Pipes,TPI Cvr,Filter cover,Stainless Bolts, DRM/DOM PROM /ZFDOC mod build #102,DRLs,BMAD with stainless Debris Screen,Coplan Air Blaster, Pioneer APP Radio 4,Brey-Krause HB,Sub Bar,Fire extinguisher seat mount,DRM Coilovers,LEDs everywhere,Compass mirror (orange),V1 DIC hidden display, Homelink sun visor, Carbon Fiber top x3 and APSIS Carbon Fiber interior, APSIS CF Steering Wheel/NAPA Leather, Banski trailing arms, Guldstrand front suspension,urethane bushings from Prothane (total suspension) ZFDoc drive shaft safety loop, raptor shift light (orange),AO engineering louver front plate, Console seat cushion, 96CE seats with black custom Sheepskins, ss billet catch can,Viper remote entry/alarm,Cragar Rear Louvers,LED side louver lights, Dewitts Radiator with SPAL fans and a Woods 160 T-Stat

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Old 10-13-2016   #3
batchman
 
Join Date: Jun 2009
Location: I live at Devens, one run at a time
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Default Re: Sticking Brakes

An infrared pyrometer or even a careful wave of the hand near each wheel might narrow your search 75%.

I agree about the booster comments but that doesn't cover the "won't roll back until cooled" part of the concern.

I'd suspect a sticky rear caliper for that part of the problem.

Luck,
- Jeff
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Old 12-14-2016   #4
USAFPILOT
 
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Default Re: Sticking Brakes

took the car out this morning to see whats what, under very hard braking I can activate the ABS light and it feels like it cycles once, then the car will slide into a cloud of smoke. I end up with both front tires in skid, based on the width of the tire marks and my 335's on the rear I can deduce the rear brakes are not locking up, just the fronts. Correct me if I'm wrong, but my car should not skid correct? What can lead to this condition?
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Old 12-14-2016   #5
jss06c6
 
Join Date: Aug 2015
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Default Re: Sticking Brakes

Happy to look at it with you.. I'm in Magnolia. Let me know how your schedule sets up tomorrow.. I'll PM you my cell number..
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Old 12-14-2016   #6
USAFPILOT
 
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Default Re: Sticking Brakes

I dropped it off at a local shop, hope they can get it right.
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Old 12-14-2016   #7
jss06c6
 
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Default Re: Sticking Brakes

Ok, will be available to help as needed..

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Old 12-14-2016   #8
USAFPILOT
 
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Default Re: Sticking Brakes

i can only handle so much frustration, gonna let the pros do a few things- brakes, suspension bushings, and an alternator.
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Old 12-14-2016   #9
G8nightman
 
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Default Re: Sticking Brakes

Might be your brake master cylinder how often do you change your brake fluid? Does the car pull when you brake? My friends 95 Z would not roll when brakes would heat up we replaced MC all good.


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Old 12-15-2016   #10
We Gone
 
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Default Re: Sticking Brakes

Have you ever changed your front brake lines? I had an issue the same as you it was the inside of the front lines had gotten soft and were collapsing not letting the fluid go back to the master cylinder. As soon as I released the pressure by opening the bleeder on the caliper it released.
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