Any IGN Expert can identify this problem

[obengston]

From the answers I have been getting everyone seems to say moisture.. So guess I will drill some holes in the cap, and spray it..

[TheJDMan]

I recommend using dielectric grease on the terminals when installing the wires. I also use dielectric grease on the spark plugs.

[Vince@Meanstreets]

Originally Posted by obengston

From the answers I have been getting everyone seems to say moisture.. So guess I will drill some holes in the cap, and spray it..

Inside is normal but I find the outside interesting. Are they cylinders #4,#6 and 2? I'd like to see the cap side of the wires with the boots off.


I'd recommend checking the plug wire resistance on the affected cylinders. What brand are they? Yep, dielectric grease will keep the resistance down.


The cap should already be vented.

[ProTouring442]

Looks to me like a poor connection between the plugwire and the cap on the corroded terminals. I see very little evidence of the terminal scraping the corrosion when you pulled the wire loose.

In any case, the wires from those terminals are toast (they'll be corroded too). Frankly, I'd replace the whole set. When you put the new wires onto the new cap (and plugs), they should snap on tightly, with a "click." Put dielectric silicone in the wire terminals (Cap side and plug side) to keep moisture out.

Do get another brass cap (like the one you have, the terminals are brass), and a good set of wires.

[obengston]

Thanks for the response. Im going to order a new set of the 8.5 mm msd wires today, and probably just go ahead and order the FAST dual sync dist, unless there are any better suggestions (and use the grease on the new ones).

[Solid LT1]

Do you put Anti-seize on your plug threads? STOP using it if you do! Looks like a couple of plugs have grounding problems.