Misfire when reaching normal operating temperature

[filtercharger]

I'm having this misfire issue that I can't seem to troubleshoot! maybe someone has had it happen before and can help me?
The car is a 92GSX, California Emissions, with a manual transmission. When started 1st time, it runs fine, no issues, after it reaches normal operating temperature and you shut it off, then start it again, it seem to be running on 3 cylinders, sounds like a Subaru! there is no check engine light. I've already replaced the power transistor(or ignitor), the coil pack, spark plugs and wires.
Again, it only does this after it reaches normal operating temperature, and you have shut it down. I can drive it anywhere on 1st start up, but then, it misfires on the 2nd start.
Any ideas?
Thanks guys!

 

[wrencher]

It only chugs & misses on a hot start, then clears up shortly there after?
Possibly a leaking injector of fuel pressure regulator, checked those?

 

[filtercharger]

It only chugs & misses on a hot start, then clears up shortly there after?
Possibly a leaking injector of fuel pressure regulator, checked those?

Well, it doesn't really clear up shortly after, basically, if you let it sit for about half the day, then it will start fine again, but yes, kinda like that!
I've not checked the injectors or regulator, thanks for the advice, I will check them next!

 

[filtercharger]

It only chugs & misses on a hot start, then clears up shortly there after?
Possibly a leaking injector of fuel pressure regulator, checked those?

Thanks brother! it ended up being a bad injector! I appreciate your help!