#33484 - 05/30/05 05:15 PM
Intermittant ABS grumble
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Registered: 08/26/02
Posts: 181
Loc: San Diego
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1998 Grand Prix 3100 SE with 106K miles. For several weeks now, every now and then when coming to a easy stop, as I'm just about stopped, there'll be a "grumble" from under the hood and the brake peddle will vibrate. A few times this has also resulted in a ABS light on the dash which was turned off by turning off the engine then restarting.
I've had this happen on rare occasion before, but ever since I had the tires rotated and balanced a couple weeks ago, it's been doing it about 5% of my easy stops.
About half a year ago I replaced the front brake pads, but chose to leave the back ones alone bacause more than half the pad material was still left on the back brakes. I didn't turn the rotors at that time because the car was SO smooth in its stopping. It still is for that matter, except for this ABS related thing.
Question: Anyone have any insight into what this ABS related thing is?
Regards, Gary in Sandy Eggo
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#33485 - 05/30/05 05:32 PM
Re: Intermittant ABS grumble
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Member
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Registered: 05/23/03
Posts: 8078
Loc: Austin, TX
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Possible hub bearing going bad, maybe?
_________________________
Bobby
Died 5/1/08, resurrected 5/15/08
ASCD SD hood, 17" Bullitts, Overkill PCM, 3.4" Pulley, NGK TR55IX, K&N 9" cone filter, JimmyC D/P, U-bend removed, Flowmaster 40 series, Hooker big bore tips with resonators, S/B brake lines, drilled/slot rotors, GMPP handling kit, KYB struts, F&R strut supports, HID's, LED's, 2.5" Air Dam, red GTP overlays on custom badges, white rear insert.
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#33486 - 05/30/05 05:56 PM
Re: Intermittant ABS grumble
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Member
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Registered: 08/09/03
Posts: 3256
Loc: Oregon
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If you have a grumble under the hood and the pedal vibrates, it sounds to me like the ABS is kicking in.
Would a hub bearing cause the ABS to trigger?
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#33488 - 05/30/05 11:42 PM
Re: Intermittant ABS grumble
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Member
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Registered: 08/26/02
Posts: 181
Loc: San Diego
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Originally posted by UMfan: Would a hub bearing cause the ABS to trigger? Aha!!! Beat information out of me. You asked if a hub bearing would cause ABS to trigger. Don't know. What I DO know and failed to include before is that ever since the tire rotation, I'm getting a very mild "runt-runt-runt-runt" sound from one of the tires up front. It's the sound that can indicate many things: wheel bearing, or blister on tire, or flat spot on tire. Wheel bearing - hmmmmmmmm. Keep the ideas coming. Regards, Gary in Sandy Eggo
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#33490 - 06/02/05 11:42 AM
Re: Intermittant ABS grumble
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Member
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Registered: 08/26/02
Posts: 181
Loc: San Diego
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Originally posted by HercMan:
Also low tire pressure could cause ABS activation. Check tire pressures first. Tires are OK. Run 35psi all around.
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#33491 - 06/02/05 12:23 PM
Re: Intermittant ABS grumble
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Member
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Registered: 05/23/03
Posts: 8078
Loc: Austin, TX
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Originally posted by gary:
You asked if a hub bearing would cause ABS to trigger. Don't know. The ABS sensor is in the hub bearing, so yes it could cause it to trigger.
_________________________
Bobby
Died 5/1/08, resurrected 5/15/08
ASCD SD hood, 17" Bullitts, Overkill PCM, 3.4" Pulley, NGK TR55IX, K&N 9" cone filter, JimmyC D/P, U-bend removed, Flowmaster 40 series, Hooker big bore tips with resonators, S/B brake lines, drilled/slot rotors, GMPP handling kit, KYB struts, F&R strut supports, HID's, LED's, 2.5" Air Dam, red GTP overlays on custom badges, white rear insert.
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#33492 - 06/02/05 08:53 PM
Re: Intermittant ABS grumble
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Member
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Registered: 05/01/02
Posts: 2126
Loc: Portland Or.
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Hello,
Question.
If it's a hub sensor, and it's causing the ABS to kick in......Even if it wasn't throwing a code, wouldn't the "low trac" light illuminate?
Later now,
Clint
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