Search found 832 matches

by bohica2xo
Wed Jun 01, 2016 3:19 pm
Forum: Automotive Air Conditioning Forum
Topic: Compressor not cycling - Pressures are steady
Replies: 5
Views: 5470

Re: Compressor not cycling - Pressures are steady

Depending on the ambient temperature when those readings were taken, things look pretty good. Cycling will happen when the low side drops far enough. If the evaporator is not icing up, the low side pressure is fine. If it will not cycle when the low side drops below 22 psi, then either your cycling ...
by bohica2xo
Mon May 30, 2016 1:31 pm
Forum: Automotive Air Conditioning Forum
Topic: Compressor not cycling - Pressures are steady
Replies: 5
Views: 5470

Re: Compressor not cycling - Pressures are steady

Open both doors on the cab.

Set the cabin fan to the highest speed.

With your gauges attached, raise the engine rpm above 1500 rpm. Observe & record the pressures while at the elevated rpm, and post them here.
by bohica2xo
Sat May 28, 2016 8:41 am
Forum: Automotive Air Conditioning Forum
Topic: V5 compressor retrofit temp/pressure checkout
Replies: 3
Views: 4503

Re: V5 compressor retrofit temp/pressure checkout

Looks like a brown control valve.

Swap it out for a Green one if you want lower evaporator temps.

The compressor is de-stroking to hold the 42 psi low side. So the high side pressures drop too.
by bohica2xo
Tue May 24, 2016 8:29 am
Forum: Automotive Air Conditioning Forum
Topic: Various Scales on Manifold Gauges
Replies: 9
Views: 10252

Re: Various Scales on Manifold Gauges

That is basically a P/T chart for both R12 (white scale) and R134a (Red / blue scales)

It is used as a quick reference.
by bohica2xo
Thu May 19, 2016 10:48 am
Forum: Automotive Air Conditioning Forum
Topic: 87 Chevy truck issues
Replies: 12
Views: 11869

Re: 87 Chevy truck issues

The A6 compressor has a sump. Oil should be added there when installing a fresh unit. The sump level can be checked with the system discharged & compressor still mounted on the vehicle. Here is the procedure under "Frigidaire 6 cylinder" http://vintage.mitchell1.com/PClubData/chassis/e...
by bohica2xo
Tue May 17, 2016 10:31 am
Forum: Automotive Air Conditioning Forum
Topic: 72 ranchero not cooling properly 134a system
Replies: 17
Views: 16354

Re: 72 ranchero not cooling properly 134a system

Ok, you have all new components. Obviously the one non OEM part is where the problem is. The OEM TXV has a pressure reference line that was originally plumbed in to the POA valve. Now it is just plumbed in to an open pipe. The reference signal is no longer right. I am presuming that the TXV bulb is ...
by bohica2xo
Tue May 17, 2016 7:53 am
Forum: Automotive Air Conditioning Forum
Topic: 72 ranchero not cooling properly 134a system
Replies: 17
Views: 16354

Re: 72 ranchero not cooling properly 134a system

OP POA valves have been out of production for nearly 30 years. Your best bet is a NOS part. Classic Air shows stock on NOS Ford POA valves: http://www.classicautoair.com/POA-Ford-Valves-Home.html I would leave the York on it. Did you replace the TXV? Is it installed correctly? How about some history...
by bohica2xo
Mon May 16, 2016 5:19 pm
Forum: Automotive Air Conditioning Forum
Topic: 72 ranchero not cooling properly 134a system
Replies: 17
Views: 16354

Re: 72 ranchero not cooling properly 134a system

Dougflas, the way I read this is: OP bought a 2 dollar tube from Old Air products to replace a $300 POA valve. Now his A/C sucks. He no longer has / never had the POA valve. I am betting that for their next act, they will tell him the tube is more modern, and that he should swap his old 12 CID compr...
by bohica2xo
Mon May 16, 2016 5:02 pm
Forum: Automotive Air Conditioning Forum
Topic: 87 Chevy truck issues
Replies: 12
Views: 11869

Re: 87 Chevy truck issues

So, where did you put the oil in the A6? This is a CCOT system. Did you pull the Orifice tube & make sure it is clear? As I recall there is an issue with the O/T breaking off in the evaporator on this model. The cheap (hack) "fix" is an aluminum tube in the liquid line with compression...
by bohica2xo
Wed May 11, 2016 6:05 pm
Forum: Automotive Air Conditioning Forum
Topic: 71 Chevrolet C/10-Pressures good / air only cool?
Replies: 18
Views: 16265

Re: 71 Chevrolet C/10-Pressures good / air only cool?

Next road test, pull it down a gear and get the cruising RPM up - then check the vent temp.

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