The vacuum line came off my heater control valve, so I slid it back on. But I have no heat! Is there an easy way to check if the vacuum is working without a vacuum gage?

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1988 Firebird Formula, 305 TPI, K&N filter in 'hole-y' cannister, MSD coil and wires, Accel cap, Monaco seats

 

Put your finger over the end of the hose...if you feel suction, you have vacuum.

You can also put a piece of small piece of paper over the end of the hose and see if it stays there.

As for the valve, you can take it off and try blowing through it, while applying vac. I'm not sure if it opens or closes with vac. but try one way and try the other.

You should be able to make it open/close.
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ASE Mechanic/Machinist/Smog Tech

RTKTGTR 1999 NBM T/A, flowmaster,FRA,Pro Kit,BMR STB, polished calipers.
1986 Chevy 3/4 ton pick up,flowmasters,4.10s,
1981 corvette FOR SALE
1995 ZX6R,Yosh,D207s

GO #3

[This message has been edited by Engineboy (edited August 01, 2000).]

 

LO88, did you "feel" the heater hoses before & after the valve? If they're hot before, and cold after, than replace the valve! I had to do that to a friend's '88 f-body once.. we switched it in a parking lot. Of course, his cracked in half, but it's the same idea

-Tom P (Hot rodded 1986 Firebird 2.8l) from http://www.v6fbody.com mailbags