North American Turbocoupe Organization



Air diverter
rich Offline
Member
#1
Hi

My air diverter doesn't work all the sudden (Vac is around 20 on the gauge so it's not a leak i guess), the air just comes out the defrost opening no matter what I set the dial to (panel or floor). What can cause this and how do I trouble shoot it? 88 Stang. Thanks
2.3L Turbo in 88 stang, browntops, 93 a4ld, volvo ic, broncoII rad, gillis valve set @15, k&n af.
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Pete D Offline
Administrator
#2
Assuming you have the manual AC/heat system,
the 2 doors that control where the air flows )panel, floor or defrost) are vacuum operated. You may have a broken line (hose) or it may have come off.

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NATO Member. it's not a vice, it's an obsession
It may be that your sole purpose in life is to serve as a warning to others.
88 TC X 2, 86 SVO, mods list at
http://www.turbotbird.com/showroom/pd_88tc.htm
Pete Dunham


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rich Offline
Member
#3
Where is the door and the vac line located that I am looking for? Thanks
2.3L Turbo in 88 stang, browntops, 93 a4ld, volvo ic, broncoII rad, gillis valve set @15, k&n af.
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Pete D Offline
Administrator
#4
Both directional doors are on the driver's side end of the evaporator case - the whole big black box under the dash. I don't have it scanned but maybe I can get to it later tonight.
Pete Dunham


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rich Offline
Member
#5
is there only one vac line going to that thing Pete? I do see a cluster of vac lines under the dash close to the diverter switch and I made sure all those were good and tight. Couldn't find a vac line connector on the door assembly though. is the connector supposed to be on the left side of the box when u look at it from inside the car? I have an 88 stang
2.3L Turbo in 88 stang, browntops, 93 a4ld, volvo ic, broncoII rad, gillis valve set @15, k&n af.
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Pete D Offline
Administrator
#6
Check your e-mail. I sent you a diagram that should help.

------------------
NATO Member. it's not a vice, it's an obsession
It may be that your sole purpose in life is to serve as a warning to others.
88 TC X 2, 86 SVO, mods list at
http://www.turbotbird.com/showroom/pd_88tc.htm
Pete Dunham


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Jeff K Offline
Administrator
#7
If it only blows out defrost, the entire system has lost vac.... if everything in the HVAC looses vac, it is designed to go to defrost. Check the vac line that runs from the vac tree to the pass side along the top of the firewall. Look for the line with a T in it where one side of the T goes in thru the firewall, and the other side goes into the pass side fender. The line into the fender goes to a vac storage can. If all the vac lines under the hood liik OK, the line to the vac can might have fell off, or the vac can cracked.

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Jeff Korn

88 Turbo Coupe: Intake and exhaust mods, T3 turbo at 20 psi, forced air intercooler, water injection, bypass valve, Ranger roller cam, subframes, etc., etc.. // 86 Tbird 5.0 (original owner): intake, exhaust, valvetrain mods, 100 HP nitrous, ignition, gears, suspension, etc., etc.... // 91 Escort: Bone stock winter car // 02 Taurus Vulcan(wifes car)
Jeff Korn

88 Turbo Coupe: Intake and exhaust mods, T3 turbo at 24 psi, forced air IC, water injection, BPV, Ranger cam, subframes, etc., etc.
86 Tbird 5.0 (original owner): intake, exhaust, valvetrain mods, 100 HP N2O, ignition, gears, suspension, etc., etc.
05 Taurus SEL Duratec daily driver
04 Taurus Duratec (wifes car)
02 Pontiac Grand Prix GT
95 Taurus GL Vulcan winter beater
67 Honda 450 Super Sport - completely customized
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rich Offline
Member
#8
Right on the money Jeff! Thanks. It was a broken hose right at the T.
[Image: smile.gif]
2.3L Turbo in 88 stang, browntops, 93 a4ld, volvo ic, broncoII rad, gillis valve set @15, k&n af.
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