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Strange coincidence that after not participating here for a while, I chimed in today on a thread about potential issues for a new eco owner and mentioned spark plug intervals. On the way home from work, cylinder 3 started misfiring. I knew I was coming up at around 30k on the plugs which is when I swap them, but is odd timing anyway.
But in this case I think my issues were my own fault. I suspect I put far too much dielectric grease on the boot on cylinders 3, and borderline too much on cylinder 5. Honestly I don't know how I wasn't SOL sooner by the look of this boot/cop. I can't even scrape away the corrosion to get to metal. Thankfully had a spare cop in the garage so I could get everything squared away tonight
Anyhow, sharing my error in the hopes it saves others from the same. I still used grease on the boots this round, but in guarded amounts.
may or maynot be related as with the exceptionally high boost (up to 16 psi) it's not unusual to see a spark plug failure like this as i'm sure you know, no boost= little problems are no big deal, big boost= little problems become big deals- and you got lucky!
Dielectric grease, or tune-up grease, is a silicone-based grease that repels moisture and protects electrical connections against corrosion. ... The grease does not conduct electricity, so it shouldn't be applied directly to the mating surfaces (pins and sockets) of an electrical connection.
CORRECT! The dielectric grease goes on the outside of the boot to seal the plug well not on the inside.
That is incorrect. Watch this video posted to YouTube by a Ford Service Technician. At about the 10:50 mark he shows a small amount of dielectric grease on the inside of the new spark plug boot.
That is incorrect. Watch this video posted to YouTube by a Ford Service Technician. At about the 10:50 mark he shows a small amount of dielectric grease on the inside of the new spark plug boot.
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