Search found 834 matches

by bohica2xo
Thu Sep 03, 2020 3:57 pm
Forum: Automotive Air Conditioning Forum
Topic: 2007 Ford AC low side cycling
Replies: 3
Views: 606

Re: 2007 Ford AC low side cycling

If that FS18 drags the 4.6 down when cycling you are pushing your luck. Grab the clutch plate on the compressor & turn it by hand. If it is gritty or notchy you have some parts to replace. Running it with 60f vents at idle means it is really low on charge. Driving it like that keeps it from retu...
by bohica2xo
Sun Aug 23, 2020 1:40 pm
Forum: Automotive Air Conditioning Forum
Topic: Help me diagnose my AC
Replies: 28
Views: 3779

Re: Help me diagnose my AC

Brielly: Go to https://www.eautorepair.net/Marketing/Default.asp And spend the 20 bucks for a one month subscription. You will get access to the FSM data and full wiring diagrams. The sensor calibration points. The fan logic path. And any temperature / pressure reference data that Jeep provided for ...
by bohica2xo
Fri Aug 21, 2020 3:54 pm
Forum: Automotive Air Conditioning Forum
Topic: Help me diagnose my AC
Replies: 28
Views: 3779

Re: Help me diagnose my AC

Your mechanical fan clutch is shot. The mechanical fan is the most powerful air mover under the hood. The electric fan is an add-on to help in extreme conditions and with the A/C. Again, Jeep has changed the aux electric fan operating parameters several times over the years. Some are supposed to com...
by bohica2xo
Fri Aug 21, 2020 2:19 pm
Forum: Automotive Air Conditioning Forum
Topic: Help me diagnose my AC
Replies: 28
Views: 3779

Re: Help me diagnose my AC

Does this vehicle have a mechanical fan and an electric fan, or only an electric fan?

Jeep has changed the fan configuration too many times to count.
by bohica2xo
Thu Aug 20, 2020 6:34 pm
Forum: Automotive Air Conditioning Forum
Topic: 2008 F350 specs
Replies: 2
Views: 915

Re: 2008 F350 specs

What is the ambient temperature for those pressures?

Was this at idle or 1800 rpm?

Which engine in this truck?
by bohica2xo
Thu Aug 20, 2020 6:22 pm
Forum: Automotive Air Conditioning Forum
Topic: Help me diagnose my AC
Replies: 28
Views: 3779

Re: Help me diagnose my AC

System is either full of air, or your condenser is not doing the job.

How way it evacuated?

Any other repairs? Why was it recharged?
by bohica2xo
Thu Aug 20, 2020 3:46 pm
Forum: Automotive Air Conditioning Forum
Topic: Help me diagnose my AC
Replies: 28
Views: 3779

Re: Help me diagnose my AC

What is the ambient temperature?

Are those pressures at idle or 1800 rpm?
by bohica2xo
Mon Aug 17, 2020 3:16 pm
Forum: Automotive Air Conditioning Forum
Topic: 1979 F150 will not cool below 60F register temps/evap partially warm
Replies: 11
Views: 1990

Re: 1979 F150 will not cool below 60F register temps

You are undercharged.

Charge 100% of the R12 charge.

The poor vacuum does not help. Not so much moisture, but remaining non-condensable gasses will raise head pressure.

If a 100% charge still leaves the evaporator warm in one place, you may have a defective evaporator.
by bohica2xo
Sun Aug 16, 2020 8:51 am
Forum: Automotive Air Conditioning Forum
Topic: 1970 Oldsmobile AC Woes
Replies: 6
Views: 1798

Re: 1970 Oldsmobile AC Woes

90 psi on the low side port sounds like a stuck (or badly misadjusted) POA valve.

Here is a video of testing the POA:

https://www.youtube.com/watch?time_continue=68&v=PhWW7hD9-Yw&feature=emb_logo
by bohica2xo
Sat Aug 15, 2020 9:12 am
Forum: Automotive Air Conditioning Forum
Topic: Discharge pipe burst - add how much oil?
Replies: 6
Views: 1118

Re: Discharge pipe burst - add how much oil?

Do it right, do it once.

Or do it over & over.

When the compressor fails, the shards will block a few passages in the condenser. Then the performance with the new compressor will be poor...

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