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ABS or brake issue

 
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Jnibbs24
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PostPosted: Thu Oct 09, 2014 10:26 pm    Post subject:  ABS or brake issue Reply with quote

so for about 7 months I was driving around with service traction system abs light on, I already knew it was my right front hub. Replaced hub. Now I still get the "service traction system on usually when I crank the wheel while backing out of a parking spot, "traction active" slowly accelerating from a stop, annnnnd idk if anyone else has had this issue but its not really a grinding sound but its deffinitely a funny sound, almost like there is air in the brake lines when I go to press on the brakes it will make this sound, Idk even how to describe it honestly but my pedal will become hard and even when I push it really hard my car will barely stop. All this was happening BEFORE my hub went bad, was acting fine when I had all the dash lights on, but as soon as I put the new hub on a couple days after it started doing this crap again. It's very damn annoying, N the last thing I wanna do is rear end somebody. I went one day when it was happening and got my brake lines flushed not even 3 min down the road it did it again, so either the shop didn't even do it or the lines aren't the issue... I'm really stumped to be honest...

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Frank
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2001 Chevrolet Impala


PostPosted: Fri Oct 10, 2014 1:21 am    Post subject:   Reply with quote

You can have air trapped in the BPMV (brake pressure modulator valve) which is part of the ABS system...unless you specifically ask to have it bled out, they will probably just do a normal brake bleed which will not get it out. Basically a pressure bleeder needs to be put on the master cylinder reservoir and a high end scan tool connected to cycle the pumps while the bleeder screws are open on the calipers to get any air out of them.

As far as the traction/ABS lights...get it scanned. It might be something as simple as a bad harness with a broken wire on one of the front control arms.

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Jnibbs24
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2003 Chevrolet Impala


PostPosted: Fri Oct 10, 2014 3:43 pm    Post subject:   Reply with quote

I'll check it out!! Thanks!!

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extremetint
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PostPosted: Mon Oct 13, 2014 8:15 am    Post subject:   Reply with quote

I had the same thing on mine and it was the ground located under the abs module all i did was move it over to a new bolt and the lights are gone.
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Jnibbs24
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PostPosted: Mon Oct 13, 2014 4:58 pm    Post subject:   Reply with quote

Where's the abs module at?

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Frank
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PostPosted: Tue Oct 14, 2014 8:10 am    Post subject:   Reply with quote

Just next to the master cylinder on the drivers side strut tower.

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Jnibbs24
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PostPosted: Thu Oct 16, 2014 9:20 pm    Post subject:   Reply with quote

did it stop that stupid traction active light and the weird sound?

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