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Unread 03-02-2014, 09:15 PM   #1
zander21510
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Odd brake cut-out

So there is this particular left turn near where I live that has a big pothole. when I slow and stop at the light normally, when I go over the pothole with my foot on the brake it vibrates like the ABS has come on but it still stops as if nothing happened.

This particular time I came to the turn, I was going a bit too fast trying to make the light. At 40ish I was going into the turn, hit the brake to execute my turn, and when I went over the pothole the pedal vibrated violently and I lost the brakes completely, I slammed down hard after a second and got them back and made the turn okay. After that they behaved normally. Brake fluid is between add and full, everywhere else it acts fine, just at that pothole does it do strange things.

Any ideas?

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1995 Jeep Grand Cherokee;
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206k: 1/6/14;
205k: 12/21/13; 204k: 11/22/13; 203k: 10/8/13; 202k: 8/29/13; 201k: 7/15/13; 200k: 6/8/13; 199k: 5/10/13; 198k: 3/17/13; 197k: 2/22/13;
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Unread 03-02-2014, 11:08 PM   #2
Timer96
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Sounds like the ABS was acting normally. Scary Uh?
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Unread 03-03-2014, 12:32 AM   #3
zander21510
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Quote:
Originally Posted by Timer96 View Post
Sounds like the ABS was acting normally. Scary Uh?
Quite lol it felt like I lost them for a second there as I was barreling through the yellow light at 40mph...
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1995 Jeep Grand Cherokee;
207,000 miles (2/6/14)

206k: 1/6/14;
205k: 12/21/13; 204k: 11/22/13; 203k: 10/8/13; 202k: 8/29/13; 201k: 7/15/13; 200k: 6/8/13; 199k: 5/10/13; 198k: 3/17/13; 197k: 2/22/13;
196k: 12/20/12; 195k: 10/26/12; 194k: 8/17/12; 193k: 5/29/12; 192k: 3/16/12; 191k: 2/18/12;
190k: 12/31/11

Current mods: 703 injectors(my howto), intake modification, 99+ intake manifold (my howto), Magnaflow hi-flow cat from Kolak & Cherry Bomb glasspack.
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Unread 03-03-2014, 07:04 AM   #4
jeepjeepster
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Yup, that's ABS. It'll get ya killed if you know how to drive but will keep you from getting killed if you don't know how to drive.
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Unread 03-03-2014, 08:57 AM   #5
Timo_90xj
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Quote:
Originally Posted by zander21510 View Post
Quite lol it felt like I lost them for a second there as I was barreling through the yellow light at 40mph...
That is one of the only downsides on an ABS- equipped vehicle. If you brake and hit a sharp pothole (or go over railroad tracks that are fairly high above pavement), the ABS system activates because your wheel(s) lock up momentarily when you hit the pothole/ sharp edge. Release brakes momentarily, and/ or try avoiding heavy braking in sharp potholes.

Pretty much the only other situation where ABS can screw you is in deep snow or mud going uphill, when you hit the brakes with the wheels spinning at 40+ MPH and you're not actually moving, when you hit the brakes the ABS will kick in, resulting in yuo sliding backwards down the hill.

Under most road conditions though, you won't have any issues with ABS.
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