How long are your spark plugs lasting?

[TravisHTX]

I don’t know if I just have bad luck, or maybe I just drive like too much of an A hole. I have had 3 F150 3.5 eco boosts since 2012 (the 3rd being my 2019 Rap). Every one of them started idling a little rough around 30k - 40k miles.

Replacing the plugs always helped. Usually around that same time frame, I have a coil go bad as well…

On the Rap, replaced the plugs at 35k, smoothed things out a good bit. Just replaced the first coil at about 39k, and think I have another that will probably be throwing a check engine light within a few K miles. I might just replace all the dam coils in 1 go.

And I don’t even have a tune.

Full-race Geoff appears to have a good recommendation for plugs I will likely try next, post 3 in the link below.

Full Race's "Gen 2.5" Raptor build

Long time lurker, first time poster - this thread will document my journey as I build my Gen2 Raptor. "Gen 2.5" is the designation for combining the 2021+ Gen3 evolutionary improvements with the simpler 17-20 Gen2 platform. I'll be cherry picking the Gen3 parts-bins and using high quality...

www.fordraptorforum.com

 

[dsiggi]

No tune here, changed mine at 90k. No misfires, but it was time.

 

[1BAD454SSv2]

Every 10K miles , I have it down to a 20 min job of actual wrenching , another 15 min prepping and gapping plugs and tools . LTR7BHX one step colder .026 gap . E50 goose tune tune.

 

[SCAR911]

Changed plugs and all is fine. Guess I just go through them quick. They were barely discolored.

 

[SCAR911]

Every 10K miles , I have it down to a 20 min job of actual wrenching , another 15 min prepping and gapping plugs and tools . LTR7BHX one step colder .026 gap . E50 goose tune tune.

View attachment 474675

Yes, thank God this is so easy.

 

[Sunchild714]

Changed plugs and all is fine. Guess I just go through them quick. They were barely discolored.

What gap & brand plugs you running?

 

[Winchester30]

What gap & brand plugs you running?

Tuned trucks are running:​

Ford Performance M-12405-35T​

.026-.028​

 

[Sunchild714]

Tuned trucks are running:​

Ford Performance M-12405-35T​

.026-.028​

I know. I'm running NGK's gapped at .026. wondering if he's running the same. My truck started throwing this code at about 7k miles on the NGK'S. I'm gonna change them but heard the Ford Performance might be better. Maybe?

 

[pcs]

Changed plugs and all is fine. Guess I just go through them quick. They were barely discolored.

barely discolored plugs after use might not be a good thing. clean plugs could be a sign of an engine running lean/hot or coolant getting into cylinder and steam cleaning the plugs.

 

[ThePaintPirate]

Just replaced mine with SP-594 plugs this weekend at 76k, Cobb off the shelf tune. Probably didn't need them but I don't know the last time they were replaced.