Air selection
09-09-2003, 08:57 PM
#1
Registered User
Thread Starter
Join Date: May 2003
Location: Phoenix Region (Used to be Milwuakee)
Posts: 106
Air selection
I am having a problem only getting vent. I cannot get it to go to defrost or floor or even heat for that matter. Anybody ever run across this problem? HELP!!!!
09-16-2003, 06:52 AM
#3
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Posts: n/a
Your vent doors are vacuum operated. The odds are very good that yo have lost the vacuum to the system. Do you have a Haynes or chilton manual? Better yet, do you have a Factory Service Manual? I would suggest getting them if you don't. The vacuum lead for your system comes through the firewall low on the passenger side. Locate it under th ehood first and then have someone move it around a bit for you so you can see it more readily under the dash. Make sure it is intact and connected on both ends. Also, check out your entire vacuum system, connections and accumulator bottle. start your engine and spray each of the connections with an aerosol carburator cleaner and wait about 10 seconds. If your engine RPM surges slightly, you have a leak at that point - fix it. If it doesn't surge, go on to the next one. There are a dozen or more to check.
09-16-2003, 09:11 AM
#4
The Evil Twin
Join Date: Mar 2001
Location: Seattle, WA
Posts: 9,294
If you have a 280Z, check that empty "water bottle" in front of the battery. The small hose leading to it sometimes gets a break in it. I replaced that hose and my defrost instantly came on! (the bottle holds vaccume)
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