Brake pedal gives off whistling noise and high speed crackin - Page 2 - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


1992-1999 Series I L27 (1992-1994 SE,SLE, SSE) & Series II L36 (1995-1999 SE, SSE, SLE) and common problems for the Series I and II L67 (all supercharged models 92-99) Including Olds 88's, Olds LSS's and Buick Lesabres Please use General Chat for non-mechanical issues, and Performance and Brainstorming for improvements.

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Old 09-18-2004, 07:49 PM   #11
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Basically, a misfire is when a cylinder should fire at a certain time, but doesn't.

As for the whistling noise, I agree that it sounds like a vacuum leak. And since it only happens when the brake pedal is down, I'm still going to say it'* the brake booster.

PontiacDad - The master cylinder doesn't have a vacuum line going to it, the vacuum line goes to the brake booster, which the master cylinder is mounted to.
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Old 09-18-2004, 08:47 PM   #12
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You sure there isn't a vacuum line for the MC? I am pretty sure there is one for the booster and MC. But remember, I am wrong more then I am right .


-justin
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Old 09-18-2004, 09:39 PM   #13
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Somebody please correct me if I'm wrong, and if I still had my Bonne I'd go check, but there is no vacuum line going to the master.
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Old 09-18-2004, 10:04 PM   #14
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I can't check tonight anymore, but I will in the morning.


-justin
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Old 09-18-2004, 10:48 PM   #15
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The vacuum line goes to the booster only. Might try a little vaseline on the inside of the connection at the manifold vacuum source and the booster. I hear they're expensive to replace.
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Old 09-18-2004, 10:52 PM   #16
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I see boosters go on eBay [87-91 gen] for $15-$20


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Old 09-18-2004, 10:57 PM   #17
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Those are probably used or china. Not something I'd put in my brakes. And that doesn't count installation, Which is a b****. My papers say to quote an hour and a half to R&R one.
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Old 09-27-2004, 01:32 AM   #18
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crazy *** night

So i am driving back from my trip about 80 miles from home.

Temp guage starts getting hot..hotter... then drops so i think mmkay

then hot again and just drops back to normal

So about 30 miles later it gets as hot as past the Red mark so i stop on the shoulder, get it towed, very annoying gettin towed 50 miles .

Doesnt even start now, the oil pressure guage is like at zero lol.
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Old 09-27-2004, 11:27 PM   #19
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soooo
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Old 09-28-2004, 10:52 AM   #20
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soooo....i'm gonna say that the whisling noise is the least of your worries at the moment.
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