[DML] AC Question - 3 of them with a little surrounding information.
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[DML] AC Question - 3 of them with a little surrounding information.

First and formost, I want to appologize for starting the Zilla 
versus others conversation... Did not want to open up sore wounds.

I know there have been alot of posts about Air Conditioning as we 
have just finished up with the summer. I did not find the answer in 
the old messages about my first problem and description.

Unfortunately where I live, it is still rather warm here, and during 
the day, AC is still needed (These cars seem to really attract the 

Here are my problems - I've only had the car for 2 months.
1. The AC Turns on, and seems to blow a cool puff of air when it 
initializes. However longer than 1 minute, and it is the same as the 
outside temperature, so it had might as well not be on.

I initially thought that i was low on R-12, so I was going to simply 
flush out the R-12, drain the mineral oil, and fill it all with R-
134 and the necessary oil required (forget what it is called off-
hand as I type this).

I still have R-12 in the system. I hooked up a pressure monitor to 
the low and high valves off the compressor in the engine bay, and 
both sides registered about 22psi (Engine was not running)
I do know that if you want to run R-134, it should be higher, but it 
was in the correct range for the R-134, therefor, I am assuming that 
the pressure for the R-12 is OK. 

In reading other posts, I would venture to guess that the switches 
low and high pressure are shot, or do i need a higher PSI for the R-
12. (I am happy to see that I am not losing the charge that I have) 
Since I do not know the correct standing pressure for R-12, I am 
asking this question.

When the car is running, both the cooling fans seem to be running, 
and the engine temperature is pretty low (i was amazed at how cool 
the car ran without the AC on)

2. When the AC is running (ie switched on through the console), 
coming out of the vents smells like exhaust. I find this one very 
strange. As I understand air conditioning, it should be pulling air 
from the outside. I do know of one hole that does not seem to be 
sealed correctly between the engine compartment and that is for the 
wiring coming off of the light switch when you open the engine 
compartment lid, the grommet is there but does not stay in. 

Could it be that the duct work is really dirty, and needs to be 
cleaned. The passenger blower fan motor (when on actually sounds 
like a cricket) is shot and burning out? When it comes to automotive 
AC, i am really in the dark. Or am I actually getting exhaust in 
from the engine compartment, and the AC is simply recirculating it?

I just replaced the rear window seal thinking that was the culprit 
for the smell when the AC is on. 

Emission tested the vehicle, it passed with flying colours... 

3. Stupid question, which valve on ac compressor is the high, and 
which is the low. I have vin 003372. Looking at the AC compressor 
from the rear of the car, they are right beside each other, with the 
same size fittings. One is left, and one is about 2 inches away to 
the direct right. I have seen the picture of the R-134 valve 
conversion on the specialtauto.com site, and it would appear that 
the low is on the left, but I would like confirmation. 

4. Is there another fuse that just may be shot (other than the 
possible 2 pressure switches)?

Thank you
      Sean - 003372

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