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ABS not working with 35s

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Old Jan 30, 2020 | 09:59 PM
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ABS not working with 35s

1997 F150 XL with 35" tires...

Just received the truck from my son, shipped from SoCal to Ohio. I noticed that the ABS is not working. Could this be due to the oversized tires? Speedo is off due to the tires as well. Will I need to change a VSS gear, or does the computer need flashed to remedy?

Any help is appreciated...
 
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Old Jan 31, 2020 | 01:59 AM
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Computer needs to be told about the current tire size OR tires need to be replaced with factory size.

Either way, ABS should work regardless, so next step would be to scan for codes.
 
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Old Jan 31, 2020 | 03:41 PM
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For ABS to kick in requires the brakes be able to almost lock ... or lock a tire.

If the brakes can't almost lock ... or lock a tire … ABS doesn't wake up.

Those 35" tires could just be just a might too much for the truck's brakes or your foot?
 
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Old Jan 31, 2020 | 08:49 PM
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Originally Posted by jplinville
1997 F150 XL with 35" tires...

Just received the truck from my son, shipped from SoCal to Ohio. I noticed that the ABS is not working. Could this be due to the oversized tires? Speedo is off due to the tires as well. Will I need to change a VSS gear, or does the computer need flashed to remedy?

Any help is appreciated...
Just curious, but what was the clue that the ABS was not working?
 
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Old Feb 2, 2020 | 03:20 AM
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I figured it out...the rear ABS wire was pulled tight with the lift. Ill extend the wire on a future warm day

Two clues about the ABS not working...ABS light on and tires locked up on wet roads with moderate pedal pressure.
 
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Old Feb 2, 2020 | 03:21 AM
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I still need tovre-gear the VSS...it reads 6mph low at highway speeds.
 
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Old Feb 4, 2020 | 12:08 AM
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Originally Posted by jplinville
I still need tovre-gear the VSS...it reads 6mph low at highway speeds.
Reprogram it in the PCM.
 
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