RodWolf19

I've got a 93 ex with the original d16z6, I've recently installed a new distributor, wires, and spark plugs. The oxygen sensor was recently replaced with a denso unit. I've had this weird miss at idle. It only shows up when it's hot outside and the motor is unloaded, no fans or ac happening.
Today I got tired of it, narrowed the miss down to cylinder 1, I can hear the injector clicking when I put a screwdriver to it and I can hear the spark arcing inside the plug tube when I pull it off.
As soon as you touch the throttle, miss is gone.
What could be the cause of it?
Thanks for reading,
Rod