2006 Silverado spark plug change

[saulgoode]

Hello folks!!

This weekend I decided to switch out my long neglected spark plugs and wires. I went with AC Delco factory replacements.

I am embarrassed to admit, but I have 195,000 on the original factory wires and plugs

I think they were due for a change.

Can anyone take a look at the pic and comet if this is typical of an old plug or is there something with the coloration I should be concerned about?

Before I changed the plugs there was definite sluggish performance and upon crank up the RPM would spike just a little then settle down (a brief 500rmp spike). After the change out there is noticeable pep and uniform RPMs. I am skeptical but could the replacements cause this?

Also, the old wires were shot, about half pulled apart in my hands as I tried to remove them.

Any feedback appreciated!