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Old 11-09-2015, 10:10 AM   #1
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Brakes cut out...

2014 Foucs SE hatch, MT 14,500 miles

So I was leaving Gillette Stadium last night, a bumper to bumper hell that is leaving a Patriots game and with my foot on the brake I start rolling back. I hadn't stalled the car and I could still give it throttle. I was in 1st, clutch in, foot on brakes, rolled backwards. Brakes didn't come back until I let the car stall and restarted. Really weird. Kinda freaked me out a bit as I've never had it happen before. Any thoughts? I ended up just shifting from neutral to first after that scared the poo out of me. Seems like my brakes just electrically failed on me. But at 14,500 miles and fresh from my 15k service this really disturbs me.


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Old 11-09-2015, 10:21 AM   #2
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Wow never heard that before. I'd for sure take it back & ahve them check it out. Its all hydraulic except for the abs. Hows the brake pad wear? brake fluid level?
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Old 11-09-2015, 10:37 AM   #3
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Everything was great. Minimal wear and fresh from my 15k mile service which included brake cleaning. I could not replicate the issue in my driveway today. I had the service on Friday.
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Old 11-09-2015, 02:13 PM   #4
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Any weird idle or running odd....I know it was serviced and rough idle would have been brought up but perhaps a small vacuum leak? I would think the brakes at a stop would work even without a brake booster.
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Old 11-09-2015, 03:04 PM   #5
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Sounded a bit louder after the initial startup. Went back to normal pretty quickly.
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Old 11-09-2015, 03:51 PM   #6
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If your drive has a little slope there's a way to recreate a possible scenario for that.

Turn the car on for a bit, put your foot on the brakes & shut it down. Then continue holding the brake lightly, modulating it a bit as you might in traffic. In a little while the car will start to roll, and won't stop unless you shove the pedal down hard.

If that happens fast, you've got a bad check valve in the hose to the brake booster (don't expect so, but it's a possibility).

If it feels like it did that night, I think the idle may have dropped low and you used up enough of the vacuum in the booster to loose the expected brake assist. Result would be that a normal light press of the pedal to hold it at a stop did nothing.

Just a guess you can check to see if it fits.
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Old 11-09-2015, 04:20 PM   #7
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Yep cars have really changed over the years but as far as i know it's still good old hydraulic pressure that clamps down on the rotors and if you blew a line, master cylinder or caliper it would stay blown and not work until repaired. The lack of power brake boost is a possibility but even then a hard push would stop you. Here's a wild idea, it wasn't the guy beside you moving ahead and you thought you were rolling back regardless of how hard you pushed on the pedal? I've done that and pressed so hard blew a wheel cylinder on my old VW bus :)!
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Old 11-10-2015, 08:53 AM   #8
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Quote:
Originally Posted by Beater1 View Post
Here's a wild idea, it wasn't the guy beside you moving ahead and you thought you were rolling back regardless of how hard you pushed on the pedal? I've done that and pressed so hard blew a wheel cylinder on my old VW bus :)!

You know what, I actually looked over at my buddy and asked him if the cars next to us were moving... I was freaking out a lil bit lol I'm perma DD for all my friends and family as I do not drink so... I was straight lol
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Old 11-13-2015, 11:35 AM   #9
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Quote:
Originally Posted by Lavacon View Post
Everything was great. Minimal wear and fresh from my 15k mile service which included brake cleaning. I could not replicate the issue in my driveway today. I had the service on Friday.
If it happens again, or you're able to replicate, I recommend heading to your dealer, Lavacon. Please keep me in the loop.

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