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July 7th, 2008, 11:53 PM
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HELP! Replaced brake (pressure) switch kit, now noisy pump?
Last week my brakes failed and discovered that I had a bad brake switch kit. It was leaking but after I blew the liquid out and put it back, I was able to drive home 30 miles no problem. I haven't driven it since for fear it'll go bad again. Well, the new brake switch part came in today adn I just replaced it. Now the brake light comes on every time I press the pedal, and the motor (accumulator??) makes a whiny whirring noise for about 5 seconds then shuts off as well as the brake light going off. I've been reading all the posts and there's nothing about a noisy motor or accumulator or whatever that I can find.
It's like I fixed a problem only to have it worse now.  Please HELP!!
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87 GN -- can I keep it stock?? 72 Cutlass -- Pro-touring     
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July 8th, 2008, 02:25 AM
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Air has been introduced to the master cylinder during the pressure switch replacement and the M/C needs to be bled. Go to Turbo Regal Web Site and visit their technical pages, brakes section. A couple of those articles describe the m/c bleeding process. It's no big deal, just a little special for the powermaster system.
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Brian MacKinnon Guntersville, AL 86 T-Type, mostly stock
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July 9th, 2008, 11:22 AM
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It's called cycling your accumulator.
It should be done to remove the air in the high pressure side of the P/M. See link in my sig for appropriate procedures.
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87' Jeep Wrangler - 'Frankenstein' - 3rd or 4th motor (dont ask), pos trani from an 89 but soon to have an AX15, Holley 350, modified wiring harness, Flowmaster 40 duals, lift shackels, continuing... http://www.jeepforum.com/forum/index.php 87' Grand National - 'Zeus' - 200K with a d@mn good PowerMaster, but now waiting on a fresh turbo, a stretch intercooler install, fresh headers, downpipe, rear diff.... A.S.E. Certified Automotive Nut #1 (Always Something Else) The PowerMaster Bleeding Procedure: http://www.turbobuick.com/forums/bra...procedure.html An excellent PowerMaster Discussion: http://www.turbobuick.com/forums/bra...ster-87gn.html
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July 9th, 2008, 01:57 PM
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Which procedure do I do -- the regular or bench bleeding procedure?
I do have darker fluid in the driver's side of the container, by the way, so I picked up some DOT4 fluid like you recommend.
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87 GN -- can I keep it stock?? 72 Cutlass -- Pro-touring
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