<p>I have currently an installed pgsql instance that is running on port <code>1486</code>. I want to change this port to <code>5433</code>, how should I proceed for this?</p>

There should be a line in your
```
postgresql.conf
```
file that says:
```
```
port = 1486
```
```
Change that.
The location of the file can vary depending on your install options. On Debian-based distros it is
```
/etc/postgresql/8.3/main/
```
On Windows it is
```
C:\Program Files\PostgreSQL\9.3\data
```
Don't forget to
```
sudo service postgresql restart
```
for changes to take effect.