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Old 03-22-2008, 10:45 AM   #1
mister mike
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Join Date: Jan 2008
Location: aurora, oregon
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power brakes

Have looked on FAQ and no help yet. Replaced std brake mc and went to a power booster with a new mc, and at the same time added rear disc. Install went well and bled the brakes first with a vacuum bleed system and then went to all four corners and got great pedal. Started truck and have no pedal at all. No brakes goes right to the floor. Shut truck off, two quick pumps and solid pedal again. I do get red brake light on at bottom of pedal stroke with engine running. What am I missing here.
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Old 03-22-2008, 10:50 AM   #2
El Jay
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Join Date: May 2007
Location: Gateway to the Delta
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Re: power brakes

Quote:
Originally Posted by mister mike View Post
Have looked on FAQ and no help yet. Replaced std brake mc and went to a power booster with a new mc, and at the same time added rear disc. Install went well and bled the brakes first with a vacuum bleed system and then went to all four corners and got great pedal. Started truck and have no pedal at all. No brakes goes right to the floor. Shut truck off, two quick pumps and solid pedal again. I do get red brake light on at bottom of pedal stroke with engine running. What am I missing here.
I would rebleed the master cylinder, & then go through & rebleed the brakes; just to be sure.

Brake fluid is cheap; wrecks cost money.
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Old 03-22-2008, 06:12 PM   #3
68gmsee
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Re: power brakes

If after you rebleed and it still acts up, replace the master cylinder again. Especially if you bought at a "fast food" auto parts store. They're not made like they used to.

I had to replace mine several times on one of my newer vehicles before finding a good one. Did the same thing you're describing. It's a PITA, but it's better than slamming into someone...
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