Air only blows through floor! Whats wrong?!?!

[NAJ]

Not exactly sure on an 86 but you should be able to see if you remove the glove box.
Here is the official description of operation of the manual ac system.
Manual A/C
This is a "Blend Air" type of system. Air enters through the cowl openings and flows through the evaporator and heater core. The blend-air door position determines the temperature of the discharge air, and is controlled by the temperature lever and control cable. The heater control valve is controlled by this lever, also, through a vacuum switch mounted on the control. The Air flow is directed by a series of vacuum-operated doors which is determined by the position of the mode lever.

[bsbllfit7]

here is a picture of the harness going into the control unit which I believe should do the changing of the modes. It has four buttons that moved when you pressedthe mode buttons on the control unit, oh ya also the car is an 88 shelby z not a 86, im not sure if that could be part of the problem

[NAJ]

The year was brain fade on my end, I have posted about 30 times or more tonight and all these cars are starting to get jumbled in my head, I was also online with Comcast tech support 3 times tonight so I am kinda computer fried right now.
I asked how long you had the car incase you just got it and someone took an ATC control head out and just threw the manual one in there.
Did you locate any motors on the heater box?
If we had futuristic technology and I could beam myself there I would, this is one I want to see in person.
Alldata is not showing the wiring for ATC but ATC has a digital led display and your is manual, ATC also uses a control module and a power/vacuum module with temp sensors in the car.
Here are pics of the 2 different systems.

[bsbllfit7]

no i didnt find any motors because frankly i dont know where they would be haha, i want to get this damn problem fixed cause its just bugging me! haha

[NAJ]

Here are pics for an 89, they are not showing any diagrams for an 88, they should be the same.
The first 3 are manual HVAC with vacuum controlled actuators, the last one is ATC with electric motors.
And on that I will say good night, it is midnight here and I am fried, been on the computer for 6 hours.

[amcpacer]

Great set of diagrams. I will have to bookmark this thread because I plan to replace my evaporator soon. I wonder how hard it would be to change over the AC system in my 85 laser from the pneumatic control to servo control with that neat electronic display? Unfortunately the wrecking yards around here in Oregon charge a fortune for everything. They would probably want hundreds of dollars for all the necessary conversion parts.

[bsbllfit7]

im an oregonian too and this problem has me flustered haha. I know its probably just what naj is saying but i cannot for the life of me find any vac lines inside the car(besides the one for the boost gauge ofcourse) anyones help that has had this problem and might be able to help on locating these things would be of great help, naj has gave great information now to put it to use

[crusty shadow]

its very possible you have a different control cluster than what is supposed to be in there. or the vac harness is hiding up inside the dash. pull out the dash trim bezel and the message center as well as the instrument cluster. you'll be able to see thing a lot easier. was there a slide cable connected to the climate control when you pulled it out? an electronic control only has one connector going to it with about 30 wires going to it in a large molex type plug. a manual cluster will have large gauge wires running to a 5-6 pun harness that plugs into the control head, and a second smaller plug for ac on of etc and a slide cable similar to a brake cable on a bike. once you have the message center out you will easily be able to see if the vacuum harness is tucked up in there. have you removed the glove box yet? take out the glove box, along with the lower panel below it- thats where all the blend doors and servos etc they are showing in those pics are located. should be able to follow vacuum harness to where its hiding if you trace it from that area. if you see a medium sized molex connector with about 20 wires going into a panel from the top with a vacuum harness also going into that, then you have an electronic climate control. with the glove box, instrument cluster and message center removed, take clear pics and post them on here so we can tell exactly which system you have- i just had to do a bunch of work on my 88 lebaron to get the blend doors and blower motor working correctly, its the same setup in your car. dont get right up on the stuff taking pics- stand back a lil bit, like in the back seat and take picss, then get closer and take pics into the dash.
its almost sounding like someone took out the electronic control thinking they could just drop in a manual, realised it wouldnt work and just put a manual in there and put the dash back together. remember- clear pics!

[bsbllfit7]

alright guys ive got a doctors appointment here in a little bit but when i get back ima take glove compartment out, everything else is already removed even the dash gauges and what not. Ill use my friends digital pictures so that you can get a much clearer picture

[NAJ]

Here is the wiring for ATC. Compare to the manual HVAC I posted earlier.

[Ender]

Quote:

Originally Posted by mondo1982 Maybe u need to replace the floor pan!?! just kidding, i dont do much posting on the forum but i find that it is a great place to find information when i am working on the daytona.

HEHE - Good One