froggy47

This is what I found when I replaced them.

Skip to 1:50 for #4 wire

Skip to 10:20 for #4 plug.


Do you think the "marginal" wire conductivity caused the plug to load up with oil/unburned fuel?

Thanks.

I'll ask again in this thread, is there any vendor that makes a decent wire? No marketing BS magic spark yadayada wires.

mgarfias

Randy @ DRM told me to just use the OE wires. Which I would have done except for the dealer wanting to bend me over the counter with no lube. I basically swap wires with the plugs whenever I start to feel like I need new plugs.

LateBreak

AC Delco wires are fine if you add heat protection of some kind, I don't trust most of the aftermarket stuff. OE wires are know to go 100k+ in a street environment, heat is the only real difference in what the wires experience on the track.

That plug definitely got loaded up with crap if the wire was bad, a quick shot of carb or brake cleaner should fix it up if you're not replacing the plugs.

LateBreak

Don't buy the wires from the dealer, you'll get much better pricing by shopping around and buying online, Amazon tends to have good prices on GM parts.

froggy47

Thanks for the comment.

It looks to me that perhaps the wires need replacing twice as often as the plugs.

froggy47

New plugs are in. Thanks!

LateBreak

Good deal, now just get some AC Delco wires and some boots like this

FASST LN

I believe there are some high performance (red) GM wires you can buy from Gene Culley or something of the like. Some additional heat protection like LateBreak posted is a good idea too.

ErnieN85

Plug wires.
Magnecore are the very best I have used them for three vettes now a over 100,000 miles each one and no failures (or crumbling)
a really good bet on #4 plug is the bad wire probably leaking spark for a while causing partial combustion. check that plug again after running the new ones for a while then you will know for sure.
BTW neat trick with the old end using it as an installer. if you use Magnecor you won't have that option as they don't fall apart (no old one to use)
Great video should be a big help for novices

froggy47

Thanks Ernie!

froggy47

Do you have to pull the black rubber boot off to slide these on? Which boot. Plug end or coil end?

Bill Dearborn

You can buy a spark plug boot remover at most any parts store for just a couple of bucks. They clamp the metal housing and allow you to twist the wire and pull it off the plug.

Bill

froggy47

Thanks Bill!

Charley Hoyt

I have extra GM wires if you want one. I am in Fountain Valley. If you come and pick it up it is yours.

Charley

froggy47

Thanks, but I put in a full new set. Appreciate the offer!