I have never had a issue with MSD wires or using a litttle dab of diaelectric grease. I dont like tearing plug wires to take stuff apart.

 

What are the signs of cracked porcelain on a plug? I've never dealt with that so I'm curious

 

Misfire especially under higher load

 

MSD's are fine, burn't couple, stock orange AcDelco atm.

 

My truck isn't throwing any codes so I doubt it's a misfire. Just pulse idk what's going on. Kinda depressing though. I guess I'll pull all the plugs when I get it back.

 

I've seen such cases in where the metal part of the spark plug hitting the headers manifold creating small sparks easy to spot. That also may cause pulsing.

 

zipties pull the plug wires off of the headers

 

Well here's an update I took it to my buddy's at Tricare and they plugged it in to there Snap on Modis. My buddy told me it was a misfire on cylinder 3, so I pulled the plug and it was missing a good chunk of cermaic, so I went to advance to get me a new plug. Well you would think when you buy AC Delco you would get an AC Delco plug. Well good thing I looked becuase tey tried to give a ford motor craft plug in a AC Delco box. All I could do was laugh any way here's a pic of the plug. ( not letting me update at the time will try again later)

 

BAM! Told you!

 

lol. poor counter guys at that advance. my other job is advance auto parts and i tell people CHECK THE DAMN BOXES before accepting a return or selling it. ive had people swap their motorcraft USED plugs in the DELCO box saying they were not used and wants a refund. HA! good luck pulling one on me. same thing where if ya drop a plug, which i do... i pull the scanner and mark it defect because one time i didnt and the guy came back mad that it cracked when i dropped it but still sold it. another way to tell of cracks is they show up as burn marks from arcing if you take it out and look.