Spark plug change in a ‘21 Powerboost

[Blackstallion]

My build date was 8/21, which seems to indicate the plugs should be Indexed plugs, but Ford did a HORRIBLE job in documenting this transition mid year since I'm getting conflicting information from them and the Auto parts retailers on which to use in my application.

I'll probably need to buy both Indexed and tapered plugs to make sure I can finish the job once plugs are pulled.

Sponsored

 

[Mosey]

My build date was 8/21, which seems to indicate the plugs should be Indexed plugs, but Ford did a HORRIBLE job in documenting this transition mid year since I'm getting conflicting information from them and the Auto parts retailers on which to use in my application.

I'll probably need to buy both Indexed and tapered plugs to make sure I can finish the job once plugs are pulled.

I’m just going to pull one out and look. I can then go get some at the local dealership.

 

[Jim26]

My build date was 8/21, which seems to indicate the plugs should be Indexed plugs, but Ford did a HORRIBLE job in documenting this transition mid year since I'm getting conflicting information from them and the Auto parts retailers on which to use in my application.

I'll probably need to buy both Indexed and tapered plugs to make sure I can finish the job once plugs are pulled.

Did you end up changing them? What spark plug did you have? I am running into the same issue

 

[Blackstallion]

Did you end up changing them? What spark plug did you have? I am running into the same issue

Not yet, only at 47k but I'm preparing to do the swap, will see once I pull them.

 

[Kanuck]

Just a thought..... over the many years of doing my own plug changes, I have found the least amount of grief was when I replaced them with OEM brand. What came out, went back in. I ran the gambit of trying this brand and then having to go back to OEM for some reason. I realize that with today's tech, the computers will adjust. Just MO..?‍

 

[miniceptor86]

Which plugs did you go with? I'm looking at the NGK Ruthenium but wondering if I should just stick work Ford OE plugs?

I’m liking the NGK rutheniums. Installed at 90K, checked at 120 and 145. Gap remained as set. Previously Motorcrafts gap grew and were replaced at 30K intervals.

 

[CDNash]

I’m liking the NGK rutheniums. Installed at 90K, checked at 120 and 145. Gap remained as set. Previously Motorcrafts gap grew and were replaced at 30K intervals.

Me too! Just changed to NGK Ruthie’s on Friday at 62.5k on the 21’ PB. I didn’t realize there were gasketed plugs vs not in the same build year. I got VERY lucky on the 0.28’s I ordered from MPT. Everything matched, little Dia grease and the socket got all 6 done in an hour.

Now to the important part…
Truck recently got Livernois tune and I stated it has CVF Titan2 IC, with charge pipes (tubes not installed yet), CAI etc. Wisdom was to run colder plugs with increased boost…

Truck fired up quieter and smoother. Just put 200 miles on into the Sierra’s and it was butter. Plugs are flawless! Rig is dialed, with Liqui Molygen on-deck to trade out Pennz plat+ full syn. Stay tuned for that update.
PS stock plugs looked as they should, with mild brown. Didn’t check gaps yet, expect they spread some and that’s the difference in idle and run improvements.

Sponsored