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Hydroboost conversion problems

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Old Jan 7, 2012 | 11:30 AM
  #11  
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Originally Posted by EMX5636
I got mine that way too, but I just unbolted the master and left mine connected in my truck. Put the hydroboost unit between the firewall and master, do the pump and lines, done. No brake bleed necessary. You'll just have to spend a bit of time bleeding them, no biggie, just a bit more work.
Didn't know that :-/. All the pics of the swap had them togther so I assumed both swapped
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Old Jan 7, 2012 | 07:31 PM
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blead the brakes and no air came out. blead the power steering for an hour. no change...
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Old Jan 8, 2012 | 12:04 AM
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Originally Posted by Bad00silverado
blead the brakes and no air came out. blead the power steering for an hour. no change...
You might have air in the ABS module. IF so, you'll have to stop by a dealer or tech who has a TECH2 scanner to properly bleed the ABS. Either that, or you could have a bad booster.
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Old Jan 8, 2012 | 12:15 AM
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There's another way you can bleed the brakes without a Tech 2. Pressure bleed the brakes, then go on a test drive and activate the ABS during hard stops 3 or 4 times in a row. Then pull it back in the shop, and pressure bleed the brakes again. It works like a charm.

Easily done if you have a gravel driveway or parking lot.
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Old Jan 8, 2012 | 10:12 AM
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Originally Posted by AKlowriderZ71
There's another way you can bleed the brakes without a Tech 2. Pressure bleed the brakes, then go on a test drive and activate the ABS during hard stops 3 or 4 times in a row. Then pull it back in the shop, and pressure bleed the brakes again. It works like a charm.

Easily done if you have a gravel driveway or parking lot.
That actually worked. But nothing has helped the cure the brakes dragging. All 4 corners are applied just a little
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Old Jan 8, 2012 | 01:37 PM
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Not sure if it could cause your problems, but you did swap the pedal right?

Good tip AK, I wasn't sure if that worked with all ABS modules or not.
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Old Jan 8, 2012 | 04:28 PM
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Yup got proper pedal
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Old Jan 8, 2012 | 06:03 PM
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OK, so the pedal feel and play has gone away, now the brakes are staying applied slightly?
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Old Jan 8, 2012 | 07:38 PM
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Originally Posted by EMX5636
OK, so the pedal feel and play has gone away, now the brakes are staying applied slightly?
pretty much. the pedal goes about 1.5 before it engauges. but its very very solid once it does. yes i jacked the truck up and all four corners are dragging about the same
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Old Jan 9, 2012 | 01:12 PM
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Originally Posted by Bad00silverado
pretty much. the pedal goes about 1.5 before it engauges. but its very very solid once it does. yes i jacked the truck up and all four corners are dragging about the same
You may have damaged the master cylinder...

When you pump the brakes with Air in the system it tends to damage the seals. it could be possible that its not realeasing the fluid all the way causing them to drag.

Also Check the guide pins and make sure there all lubed up properly.
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