problem or not? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

willow72 · 03-12-2005, 08:49 AM

my brake booster vacume line runs from booster too a tee then another line runs too pvc valve then too the back of my demon is this agood thing too do or not? if it is a problem where should the brake booster line hook up at and where does thepvc valve hook too? in all the picture of yalls truck i have never seen any of yalls hooked up this way any help would be great thanks, john

OLDROCK&ROLLER · 03-12-2005, 09:40 AM

Don't know if you have a real problems or not? Your brake booster should hook to your intake and the pcv line to your carb. This way the fumes that are created in your "motor" are mixed with the incoming air and reburned.You might also have a line from a charcoal canister that tee's into your pcv line.

krue · 03-12-2005, 10:34 AM

If it were me I would try to make sure the booster had it's own source of vacuum.

70 shorty · 03-12-2005, 03:45 PM

I've also gotten the same advice, the brake booster needs a dedicated source of vacumn. It makes sense, you'd hate to find out your brakes weren't up to snuff at the worst possibel time.

72MARIO · 03-12-2005, 04:09 PM

Brake booster should have a fitting in the intake. Check any old intake it will have the fitting you need.

gefs55 · 03-12-2005, 04:09 PM

Just got done doing the same with mine had a tee placed on the back of my demon. The truck does seem to run fine how it is setup. I have another vacum port on my intake manifold and will change to that to have a dedicated line for the brakes when it gets warm. Do you have any problems with your demon running rich when the engine is cold?

willow72 · 03-12-2005, 06:17 PM

i did have a problem with the demon running rich when cold demon techs had me drill out my air bleeds a little larger which was verry easy contact demon tech thy are very helpful,john

gefs55 · 03-13-2005, 12:33 AM

Thanks for the help on the demon I will give them a call.

03-12-2005, 08:49 AM	#1
willow72 Registered User Join Date: Nov 2003 Location: dallas/ftwoth Posts: 112	problem or not? my brake booster vacume line runs from booster too a tee then another line runs too pvc valve then too the back of my demon is this agood thing too do or not? if it is a problem where should the brake booster line hook up at and where does thepvc valve hook too? in all the picture of yalls truck i have never seen any of yalls hooked up this way any help would be great thanks, john

03-12-2005, 09:40 AM	#2
OLDROCK&ROLLER Registered User Join Date: Feb 2004 Location: WHITEVILLE N.C. Posts: 494	Don't know if you have a real problems or not? Your brake booster should hook to your intake and the pcv line to your carb. This way the fumes that are created in your "motor" are mixed with the incoming air and reburned.You might also have a line from a charcoal canister that tee's into your pcv line. __________________ 72 CHEYENNE 10 SUPER 468/400/3.73

03-12-2005, 10:34 AM	#3
krue Designated A-hole! Join Date: Mar 2003 Location: South Mississippi Posts: 36,450	If it were me I would try to make sure the booster had it's own source of vacuum. __________________ "If it ain't broke, fix it 'til it is!" Being stupid ain't illegal. We're Still Debt Free Except for the House!!! www.daveramsey.com 70 GMC SWB Stepside project "Green Booger" soon to be 6.0l/4l80e 93 S-10 "Poppaw's Truck"

03-12-2005, 03:45 PM	#4
70 shorty Where's my beer? Join Date: Oct 2004 Location: Glen Allen, VA Posts: 1,768	I've also gotten the same advice, the brake booster needs a dedicated source of vacumn. It makes sense, you'd hate to find out your brakes weren't up to snuff at the worst possibel time. __________________ 70 C10, shortstep, .30 over 250,Hurst shifted 3 spd parts hauler. Holley 390, Clifford Intake, Header, ported cylinder head, unknown bigger cam. 79 Corvette L82, 4 spd, black, red interior, headers, flowmasters, and unkown bigger cam. '03 Grand Cherokee Laredo, 4.0 4x4 daily driver. 165K miles, and runs great '08 Tahoe LTZ 4x4 155K

03-12-2005, 04:09 PM	#5
72MARIO Registered User Join Date: Nov 2000 Location: Huntsville Ontario Canada Posts: 4,052	Brake booster should have a fitting in the intake. Check any old intake it will have the fitting you need. __________________ 1968 Suburban numbers matching all original truck now equipped with 6.0/4L80 on Accuair http://67-72chevytrucks.com/vboard/s...d.php?t=625017 1967 C/20 6.0/4L80 Roofing Truck 1990 V2500 Suburban "Plow Truck" 2005 TAHOE DD

03-12-2005, 04:09 PM	#6
gefs55 Registered User Join Date: Nov 2004 Location: Lebanon ohio Posts: 22	Just got done doing the same with mine had a tee placed on the back of my demon. The truck does seem to run fine how it is setup. I have another vacum port on my intake manifold and will change to that to have a dedicated line for the brakes when it gets warm. Do you have any problems with your demon running rich when the engine is cold?

03-12-2005, 06:17 PM	#7
willow72 Registered User Join Date: Nov 2003 Location: dallas/ftwoth Posts: 112	i did have a problem with the demon running rich when cold demon techs had me drill out my air bleeds a little larger which was verry easy contact demon tech thy are very helpful,john

03-13-2005, 12:33 AM	#8
gefs55 Registered User Join Date: Nov 2004 Location: Lebanon ohio Posts: 22	Thanks for the help on the demon I will give them a call.



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