You did not check pressure. If there is even one ounce in the system it will spew when venting the valve.

To check pressure use a set of manifold gauges on both the low and high sides, let a/c run full blast for five minutes with engine running 1500 RP to stabilize pressures. THEN post the low and high pressures and ambient temperatures. That is the only way to get a meaningful diagnosis.

We will try to help you, but none of us are paid to do so. Please be patient and a tone of appreciation is always helpful to your cause when getting help from volunteers.