A/C Acting weird...

[Slow Car Sport Mode]

What @FowVay said. While it is not cooling, stop somewhere leaving the engine running and the A/C on. Look under the hood for the following: Is the compressor engaged (front plate spinning)? Is the condenser fan running? (I think this is like a Civic where the condenser and radiator are separate, with separate fans, and the condenser is the one on the driver's side). Is the big line leading to the compressor cold, and/or does it have ice on it? Don't touch the small line leading to the compressor, it will be very hot.

The small line is the High Side and the big line is the Low Side.

 

[zzyzzx]

https://www.harborfreight.com/ac-r134a-manifold-gauge-set-60806.html

A/C R134A Manifold Gauge Set​

Use this A/C Manifold Gauge Set to service automotive air conditioning

$49.97

 

[BellyUpFish]

https://www.harborfreight.com/ac-r134a-manifold-gauge-set-60806.html

A/C R134A Manifold Gauge Set​

Use this A/C Manifold Gauge Set to service automotive air conditioning

$49.97

Ok, so I put some gauges on it this weekend and this is what I got. ~90°F/35% humidity.

Not running:
Low side - 57
High side - 125

Running with AC high
Low - 21
High - 180

Running with AC off
Low - 34
High - 160

Tuning 2700rpm
Low -10
High - 225

After Shut down
Low - 28
High - 200

Both cooling fans are operating.

 

[Chris142]

Ok, so I put some gauges on it this weekend and this is what I got. ~90°F/35% humidity.

Not running:
Low side - 57
High side - 125

Running with AC high
Low - 21
High - 180

Running with AC off
Low - 34
High - 160

Tuning 2700rpm
Low -10
High - 225

After Shut down
Low - 28
High - 200

Both cooling fans are operating.

Low side is too low. And it looks like it's not equalizing after shut off.... Expansion valve is bad.

 

[Lubener]

Suction side is too low for 90 degrees.Should be about 40-45. I would also expect around 220 on the discharge side @90 degrees.Needs refridgerant for a start.. Agree with the expansion valve too.