Originally Posted by OTRtech
An injector partially stuck open would dump the remaining fuel in the fuel rail until the pressure went down.
With a cold engine, the fuel would have had time to evaporate and not cause a problem.
A warm engine, just shut down for a short time would have gas sitting in the intake causing too rich of a fuel/air mixture.
Mine does this occasionally.
Try some Injector cleaner, i recommend Lucas Oil. i do it about every 6 months, keeps them clean and lubricates the lifters.