Tamiya Basic Spray Work Airbrush keeps spraying paint without pulling trigger

Tools, Techniques, and Reference Materials Painting and airbrushing
1

I’ve tested this on my old and a new Tamiya Spray Work airbrush now and don’t know what’s wrong. I was spraying Vallejo Metal color ( unthinned since it’s already thin) and the airbrush is connected to a Sparmax compressor. once I turn on compressor the paint sprays out even when I’m. Or pulling trigger back. When I do pull trigger back of course it sprays even more paint. Needle is in all the way and not bent. No leaks of paint cup. Compressor hose is attached to an adapter to properly fit the airbrush to the iwata hose. What’s going on?
thanks.

2

Strip down the airbush and clean each part with lacquer thinner very thuroughly. That should stop the paint spraying out the tip. The air trigger is stuck. Remove the trigger and clean it from the top. Clean it with thinner also and put some lube on it and reassemble it.

3

Thanks. I’ll try that. It’s just odd this happened when the airbrush is new never used. I even lowered the PSI.
thanks

4

The olny way for paint to come out of the nozzle without pulling the trigger back is cause the needle is not seating completely. It could be some junk, a piece of metal, etc not allowing the needle to go all the way forward.