Not sure of this is right place for this, please move if necessary.

I just acquired a complete engine harness for the Eclipse. Im curious if the "gunk" that's on the plugs is normal and there for a reason. Maybe keep connectors from corroding? Better connection for the plugs? Or is it some type of mold, residue build up? Curious if I should clean up before install or its there for a good reason and let it be. Thanks.

95 GS Boosted

That looks like old dielectric grease or possibly lithium. Dielectric is used to prevent corrosion and promote conductivity.
Not to worry. Just give a blast w/brake parts cleaner and remember to use fresh dielectric grease when you hook up the harness.