ABS problem since spindle swap...Weird issue that I need help with
03-13-2011, 05:29 PM
#11
This problem started with the new spindles, right? That is making me believe that you have an air gap between the sensor and the trigger wheel that is out of spec. Most likely, your low priced eBay spindles are machined incorrectly by just a couple thousandths. You'll need to look up the air gap spec and measure what you have. Then either shim out the sensor, or remove some material from the knuckle to get the correct air gap.
03-13-2011, 06:02 PM
#12
This problem started with the new spindles, right? That is making me believe that you have an air gap between the sensor and the trigger wheel that is out of spec. Most likely, your low priced eBay spindles are machined incorrectly by just a couple thousandths. You'll need to look up the air gap spec and measure what you have. Then either shim out the sensor, or remove some material from the knuckle to get the correct air gap.
I actually tried to find some sort of spec on the air gap of the sensor, but had no luck whatsoever. Any ideas where to find that info? I have Mitchell On Demand access from home but even there had no luck finding any specs, or even how to properly check the gap...
BTW, I never get an ABS light when this happens, just the pedal pushing back and hearing the motor kick in.
03-13-2011, 08:42 PM
#13
Well, you might have a bad hub bearing, the more I think about it. The sensor mounts to the hub, not the knuckle, right? A worn bearing will affect the air gap. These types of problems do not set ABS DTC's or illuminate the ABS warning light.
Since you have Mitchell, log in, enter your vehicle info, and go to TSB. Type "unwanted abs activation" in the search window. The second link will give you a test procedure.
I know the air gap spec is in a bulletin also, but I haven't found it yet.
Since you have Mitchell, log in, enter your vehicle info, and go to TSB. Type "unwanted abs activation" in the search window. The second link will give you a test procedure.
I know the air gap spec is in a bulletin also, but I haven't found it yet.
03-13-2011, 08:49 PM
#14
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The spec for the air gap is around .040". I don't think you will find it anywhere. It sounds like you have a cheap aftermarket hub. A factory hub wouldn't have shims on the sensor. The air gap is definitely the problem. Your best bet would be to file the mount surface on the hub down to close the air gap.
03-13-2011, 10:18 PM
#15
Well, you might have a bad hub bearing, the more I think about it. The sensor mounts to the hub, not the knuckle, right? A worn bearing will affect the air gap. These types of problems do not set ABS DTC's or illuminate the ABS warning light.
Since you have Mitchell, log in, enter your vehicle info, and go to TSB. Type "unwanted abs activation" in the search window. The second link will give you a test procedure.
I know the air gap spec is in a bulletin also, but I haven't found it yet.
Since you have Mitchell, log in, enter your vehicle info, and go to TSB. Type "unwanted abs activation" in the search window. The second link will give you a test procedure.
I know the air gap spec is in a bulletin also, but I haven't found it yet.
The spec for the air gap is around .040". I don't think you will find it anywhere. It sounds like you have a cheap aftermarket hub. A factory hub wouldn't have shims on the sensor. The air gap is definitely the problem. Your best bet would be to file the mount surface on the hub down to close the air gap.
If the hub checks out OK, I think I will try "re-fitting" the sensor to the hub.
Only issue now is that it's hard for me to do darn near anything with this stupid broken foot...
Thanks for the replies/suggestions guys.
03-13-2011, 10:23 PM
#16
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I know how you feel. I broke my leg in a motorcycle accident back in September and I've got a few more months to go before I'm back on my feet.
03-16-2011, 04:16 PM
#18
Just to UPDATE...
I stopped by my buddy's shop, where the alignment and wheel hub/abs sensor were replaced several months ago. He swore I screwed something up, even though he knows I've been a mechanic of some sort for the last 30 years, lol.
He got me another complete National brand (Federal-Mogul) wheel bearing hub assembly, complete with new ABS sensor for free. By "free", I mean he simply warrantied it for me since it has a lifetime warranty that I didn't know about.
Can't hobble around to do it until the weekend, but it should take care of this PITA intermittent issue for the foreseeable future.
I stopped by my buddy's shop, where the alignment and wheel hub/abs sensor were replaced several months ago. He swore I screwed something up, even though he knows I've been a mechanic of some sort for the last 30 years, lol.
He got me another complete National brand (Federal-Mogul) wheel bearing hub assembly, complete with new ABS sensor for free. By "free", I mean he simply warrantied it for me since it has a lifetime warranty that I didn't know about.
Can't hobble around to do it until the weekend, but it should take care of this PITA intermittent issue for the foreseeable future.
03-16-2011, 07:33 PM
#20
My toes are still purple
The worst part about this is that I had just started back to the gym about a month ago, after a 5 year hiatus. Was just getting back into a routine. Now, I guess due to liability issues, they won't even let me come in to do any non-foot related exercises...