I have a misfire on cylinder #4 I checked
Compression and was fine
I have spark and fuel
I replaced the distributor, spark plugs,wires and injector
And I have the same problem
When I disconnect the fuel injector plug for #4
I get no reactions but when I remove the plug
From any other fuel injector it does what
It would normally would do and try and shutoff
I also checked timing and that was fine as well

What can be my problem ?

Check the wiring going to fuel injector #4. There may be an issue, such as a short (mice chewing on the wire) or a wiring break. Carefully check the wiring going into the connector.