help for 81zx automagic ac/heater

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Don - 29 Nov 2004 19:15 GMT

Does anyone have any pointers to infomation about how this automagic ac unit
works. I fixed a problem with it but in the process I've had a lot of troubles
getting all the vacuum hoses back in the right spots. I've got a repair manual
but its pretty limited. Theory of operation with explanations about how all
these vacuum servos interact is what I really need. Between old marginal parts
and wrong vacuum hoses its damn near impossible to get the thing workin. It
would be nice if I could somehow remove many of the automagic features to
simplify it but without knowing what does what it seams impossible.

tks
Don

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Steve T - 30 Nov 2004 06:09 GMT

> Does anyone have any pointers to infomation about how this automagic ac
> unit
> works.

They don't work and didn't work long even when they were new. This was a
really BAD system.

> Between old marginal
> parts
> and wrong vacuum hoses its damn near impossible to get the thing workin.

I doubt you will.

> It would be nice if I could somehow remove many of the automagic features
> to simplify it but without knowing what does what it seams impossible.

Best thing to do? Pull the dash board (it's not hard..) and get the heater
box,controls,blower housing from a non-automagic manual A/C car from a
junkyard. This is MUCH less of a headache and will actually work when
you're done.

Signature

Steve

http://www.atlantaracing.com

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lostokie - 30 Nov 2004 12:50 GMT

"lostokie wrote"
there is a nice help web page at http://z31.com/repairs/heater.shtml which
tells you how the climate control unit is suppose to work and how to run a
self-diagnostic on it. also there is a vacuum diagram at
http://users2.ev1.net/~jboykin/vaclines.htm

> > Does anyone have any pointers to infomation about how this automagic ac
> > unit
[quoted text clipped - 16 lines]
> junkyard. This is MUCH less of a headache and will actually work when
> you're done.

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Don - 30 Nov 2004 18:15 GMT

I should have been more specific. this is a 280zx not 300zx. Is there a way to
search those links to see if I get a hit for 280zx.

2nd question. for Steve T. Is the air box the same but the actuators are the
only difference between the 2 systems? If so then I could just transfer the
actuators. I don't know if I can stomach removing the whole *(&^ thing. Maybe
no choise.

Don
280zx with flakey heater/ac
240z that rides like a buckboard

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