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Gordo · 09-19-2002, 10:02 PM

Start with checking the vaccum supply. With engine running, dissconect the hose from the check valve at the booster, you should have a strong vaccum and left unplugged it should stall the engine, if not you may have a restriction either in a collasped hose or crud build up at manifold. If you have a strong vaccum, reconnect hose, restart engine briefly then shut down, remove hose again leaving the plastic check valve in place in booster, is the valve holding vaccum within booster? no? Replace valve. Yes? Depress brake pedal and hold still, do you hear a constant vaccum leak? Yes? Replace booster.

09-19-2002, 10:02 PM	#7
Gordo Registered User Join Date: Jan 2001 Location: Killingworth, CT. USA Posts: 3,378	Start with checking the vaccum supply. With engine running, dissconect the hose from the check valve at the booster, you should have a strong vaccum and left unplugged it should stall the engine, if not you may have a restriction either in a collasped hose or crud build up at manifold. If you have a strong vaccum, reconnect hose, restart engine briefly then shut down, remove hose again leaving the plastic check valve in place in booster, is the valve holding vaccum within booster? no? Replace valve. Yes? Depress brake pedal and hold still, do you hear a constant vaccum leak? Yes? Replace booster. __________________ 1971 C10 swb stepside 350/700R4/3.73posi (retired as of 4/22/03) 1998 S10 short bed 2002 S10 Blazer 1942 Oldsmobile 1958 Massey Harris Pony 1951 Wife Killingworth, Connecticut May those who love us, love us, any of those who do not love us, may God turn their hearts. And if God is unable to turn their hearts, may he turn their ankles so we may know them by their limping. A man who works with his hands is a laborer; a man who works with his hands and his brain is a craftsman; but a man who works with his hands and his brain and his heart is an artist.