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-   -   Brake pedal is slow to return (http://www.clubcobra.com/forums/classic-roadsters-ii/137271-brake-pedal-slow-return.html)

Wisconsin_Snake 09-26-2016 08:26 PM

Brake pedal is slow to return
 
After hooking up the brakes and finally taking the car for it's first drive, I realized that after I pressed the brake pedal. It was slow to return to it's extended position.
What would cause this?
I take it that the pedal should not have a spring to assist it returning.
The engine is a stock FI Ford 302so the vacuum should be there.

MaSnaka 09-26-2016 09:37 PM

I use a return spring but just to insure my pedal is making good contact on the brake light switch. It would not always turn off the brake lights when released. I did have to replace the master cylinder so maybe the bad MC was part to blame??? IDK. BTW I don't have a vacuum assist.

John

okiedokie 09-27-2016 06:57 AM

Brake pedal return
 
I had the same problem even after replacing the MC. Right or wrong, I now use return spring .

C5GTO 09-27-2016 01:58 PM

Return spring
 
Like the others have said, I installed a return spring just to make sure the brake light switch is turned off. The first spring I installed wasn't strong enough and the brake lights stayed on for a whole day after driving to work. :mad:

So I replaced it with a bigger spring. So far, so good.

ACademic 09-27-2016 04:46 PM

Does it also do this with engine off? If so then probably a bad booster. The diaphragm may be leaking and allowing vacuum on both sides of the booster, thus the slow pedal return. Bleed them good first just to eliminate air in the lines before you start throwing parts at the problem.


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