#5 cylinder not firing at idle, has spark & new fuel injecter , good compression, is 3.1 v6 please help

Welcome to the boards there!

Can you swap a wire with another? If no difference, then swap them back, and swap a plug?

Pull the distributor cap and check out the rotor contact inside the cap for scorching/scoring...

Welcome to the boards there!

Can you swap a wire with another? If no difference, then swap them back, and swap a plug?

Pull the distributor cap and check out the rotor contact inside the cap for scorching/scoring...

FIRST there is no dist. cap on that engine. Check the CKP sensor, the actual voltage reaching the plug, and the condition of the plug (what color buildup is around the electrode), if any. New injector does not necessarily mean that it is getting fuel @that speed.
Check to find out if there is power to the injector.