Search found 40 matches

by tourmax
Thu Jun 25, 2020 5:32 pm
Forum: Automotive Air Conditioning Forum
Topic: New member needs advice from the AC experts. :)
Replies: 18
Views: 343

Re: New member needs advice from the AC experts. :)

Well here in the US we still have R12 on the shelf. 134a will be in inventory for a LONG time. This is not canuckistan, where the eco weenies always get their way. I can still buy R500 if I want it. I have no idea where “canuckistan” is, I do know where CANADA Is. Lets leave the childish name calli...
by tourmax
Wed Jun 24, 2020 4:55 pm
Forum: Automotive Air Conditioning Forum
Topic: New member needs advice from the AC experts. :)
Replies: 18
Views: 343

Re: New member needs advice from the AC experts. :)

Not to pop your bubble, but r134 is also coming to "end of life". R1234yf is being phased in to replace r134. I wouldn't worry about too much about it though, unless you plan to keep that Miata for another ten years or more.... R1234yf is a newer refrigerant for new production vehicles. N...
by tourmax
Wed Jun 24, 2020 4:03 pm
Forum: Automotive Air Conditioning Forum
Topic: New member needs advice from the AC experts. :)
Replies: 18
Views: 343

Re: New member needs advice from the AC experts. :)

Not to pop your bubble, but r134 is also coming to "end of life".

R1234yf is being phased in to replace r134.

I wouldn't worry about too much about it though, unless you plan to keep that Miata for another ten years or more....
by tourmax
Wed Jun 24, 2020 3:10 pm
Forum: Automotive Air Conditioning Forum
Topic: 12, 12a, 134a
Replies: 7
Views: 115

Re: 12, 12a, 134a

12a is legal to use in Canada. But you need to know the rules and you need to know the limitations of the product. The problems I see with it is more about marketing than use. For example; their add material says it's compatible with r12/r134. But if you read into the information on the web site (an...
by tourmax
Wed Jun 24, 2020 2:53 pm
Forum: Automotive Air Conditioning Forum
Topic: 12, 12a, 134a
Replies: 7
Views: 115

Re: 12, 12a, 134a

R-12 is not the same as R-12a. The latter, a so-called alternative refrigerant (RedTek, etc.), is a hydrocarbon-based, highly flammable, propane formulation that is marketed as a replacement for R-12. Moreover, R-12a often contains additives, like sealers and "performance enhancers," that...
by tourmax
Wed Jun 24, 2020 2:50 pm
Forum: Automotive Air Conditioning Forum
Topic: 1988 corvette, don't understand what it's doing?
Replies: 57
Views: 6634

Re: 1988 corvette, don't understand what it's doing?

couldn't wait to find out, so I spun the switch off the line. Thankfully, there was a schrader valve in there. The switch wasn't very tight, I could spin it off by hand. The switch was open to the high side pressure, as I go t a small "pssst" as I threaded the switch off. So that pretty mu...
by tourmax
Wed Jun 24, 2020 1:50 pm
Forum: Automotive Air Conditioning Forum
Topic: 1988 corvette, don't understand what it's doing?
Replies: 57
Views: 6634

Re: 1988 corvette, don't understand what it's doing?

Well, no one local could get the switch. Gm is no help, which is not a surprise as GM generally "abandons" any model over ten years old. All the jobbers were a bust, or the costs (IF they can order one) were going to be in the $80-100range (welcome to Canada). I ended up getting the part n...
by tourmax
Tue Jun 23, 2020 5:38 pm
Forum: Automotive Air Conditioning Forum
Topic: 1988 corvette, don't understand what it's doing?
Replies: 57
Views: 6634

Re: 1988 corvette, don't understand what it's doing?

Alrighty! last thing to fix has been identified! My rad fan wasn't coming on with the AC on signal. My Vette has the electronic control head (very avaunt guard in 1988!) and when you turn on the AC it sends a signal to the ecm. The ECM is then supposed to increase idle speed and if the head pressure...
by tourmax
Sat Jun 20, 2020 11:33 am
Forum: Automotive Air Conditioning Forum
Topic: 1988 corvette, don't understand what it's doing?
Replies: 57
Views: 6634

Re: 1988 corvette, don't understand what it's doing?

I'm using a Four Seasons Fan Relay kit - part number 35879 - to make one of the E-fans on my 70 Chevy El Camino kick on the instant that the AC compressor clutch engages. This kit has a special compressor wire that overrides the wait time for the engine temperature to kick a fan on. This also helps...
by tourmax
Fri Jun 19, 2020 5:16 pm
Forum: Automotive Air Conditioning Forum
Topic: 1988 corvette, don't understand what it's doing?
Replies: 57
Views: 6634

Re: 1988 corvette, don't understand what it's doing?

Had supper and then took it out for a test drive. Vent therm started at 35c. After a short drive up the street, the vent temp dropped to 11/12c. As soon as I was moving slow (or stopped) the vent temps would start climbing, once as high as 28c. Get rolling again and they drop right back down in the ...

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