Zetterbeard
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Just to confirm, the M-12405-35T plugs do fit the 2.3L in the Ranger gaped at .026? Just want to double check before purchasing.
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HoosierT
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Yep! They fit and the truck is running super well. Had them in for about 200 miles so far.
Engmus
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I went in another direction and picked up NGK 95605 LTR7BHX Ruthenium HX Plug , which should be one step colder Ruthenium style NGK's.
I"ll let you guys know how it goes when I get them installed.
I"ll let you guys know how it goes when I get them installed.
HoosierT
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The only issue I see is the .043 gap, The most allowable gap change that NGK supports is .008, so the smallest gap you'll get to is .035. That very likely to cause spark blowout and a slight loss in performance. Stock gap is .030 and recommended tuned gap is .026-.028.
Engmus
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You aren't wrong, i'll likely gap them down to .27 some of the Fiesta and Focus guys have been doing that with no issue.
Lazz
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That part number (M-12405-35T) is slotted for the 3.5 Ecoboost V6 motors- only sold in sets of 6. The Ford Performance plugs that are specked for the 2018 2.3 Focus RS and Mustang 2.3 Ecoboost are M-12405-20T, said to be 2 steps colder than stock. Any reason you chose the plugs for the V6 ecoboost from Ford Performance? Or is it the same plug as the M-12405-20T? All Ecoboost plugs seem to be the same configuration. The M-12405-20T are also a lot more expensive for some reason.
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Superdannyboy
Well-Known Member
Anyone running the NGK ruthenium one step colder?
5 star recommends swapping plugs at 30-35k miles and I'm at 41k!
Is it 95605?
When I type in the specs of the truck rockauto gives me PN 90495 which is heat range 6
5 star recommends swapping plugs at 30-35k miles and I'm at 41k!
Is it 95605?
When I type in the specs of the truck rockauto gives me PN 90495 which is heat range 6
Ranger2020zoomzoom
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Did you ever find out the one step colder plugs and where did you get them?
Wytchdctr
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Run old school copper a step colder and change with every oil change (they are cheap). Worked with my nitrous injector stupid mobile.
Just... lots of changing plugs.
Just... lots of changing plugs.
Superdannyboy
Well-Known Member
Yea I put the 95605 and bought em from rockauto.
Ranger2020zoomzoom
Well-Known Member
So the colder plugs are part # Ford Performance M-12405-35T? Itās not me itās the Jack Daniels.Okay, so I was assuming my truck had the sp542(one step colder plugs) based on other EB platforms and what @tjanok found above. However, my truck indeed had sp578 (CYFS12YPT) in it. Picture below, they donāt look great after 24.9k miles but 19k of those have been while running the 93 performance tune. I installed the sp542 one step colder plugs (ford performance part number above) and I can say with certainty that the truck runs and idles more smoothly. Iām glad I changed them out for sure.
Zetterbeard
Well-Known Member
That is what I switched to after a tune and performance parts.
https://www.levittownfordparts.com/sku/m-12405-35t.html
Ranger2020zoomzoom
Well-Known Member
Think these are equal or is the one you got better?
NGK 95822 Laser Iridium Spark Plugs
Zetterbeard
Well-Known Member
Honestly not too sure, went FP so I wouldn't be wondering if it was the right temp.
Simbyote
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I'll leave this here for anyone searching.
Another post in this thread mentioned the M-12405-20T, and I ended up ordering those after figuring the only difference being a 4-ct pack instead of the 6-ct pack (2.0L vs 3.5L). I was also convinced they'd be the same plugs after reading a bunch of other EB forum posts.
Here is what I've learned:
The Ranger was manufactured with SP542 plugs originally, at some point the factory changed to SP578, so which one you have from the mfg will vary.
The M-12405-35T are a plug 1-Step colder than the stock SP542 plug, which is no longer available.
The M-12405-20T are 2-Steps colder than that same (original) stock plug.
The SP542 was replaced by the SP578. Which is also being replaced by the SP594.
After getting impatient and dealing with dealers and parts houses that were less than helpful, I just went with the SP594 plugs and put them in a rush on a Friday evening only to find that my truck started misfiring under heavy load/throttle/under boost. (I'm running the 5-Star Tuning 93Perf).
So I put the factory plugs back in until the M1240520T's came in.
Finally tonight I received the cold plugs (ordered from Levitown ford) which do seem to be packaged by Ford Performance.
The M-12405-20T is a plug manufactured by Denso (P#ITV24) used by Ford Performance in some of their performance packages. (This was immediately obvious after opening the package).
There are some subtle differences in the sizing of the plug which you can see in the pic and they are pre-gapped to .028(confirmed); but the plug body (seat to tip) is the same so I decided to give it a try.
All that said; I allowed the truck to warm up and gave it a 10mi light break-in and she is running beautifully.
In summary:
The Denso ITV24 can be used, works well and can be had for $10ea on Amazon. I spent about 6hrs and $180 to figure this out so hopefully someone else can benefit also.
Cheers
>>>>> Plug Pic Left to Right: (Stock) SP578, Denso ITV24{Ford M-12405-20T}, OEM Rplmnt SP594
Another post in this thread mentioned the M-12405-20T, and I ended up ordering those after figuring the only difference being a 4-ct pack instead of the 6-ct pack (2.0L vs 3.5L). I was also convinced they'd be the same plugs after reading a bunch of other EB forum posts.
Here is what I've learned:
The Ranger was manufactured with SP542 plugs originally, at some point the factory changed to SP578, so which one you have from the mfg will vary.
The M-12405-35T are a plug 1-Step colder than the stock SP542 plug, which is no longer available.
The M-12405-20T are 2-Steps colder than that same (original) stock plug.
The SP542 was replaced by the SP578. Which is also being replaced by the SP594.
After getting impatient and dealing with dealers and parts houses that were less than helpful, I just went with the SP594 plugs and put them in a rush on a Friday evening only to find that my truck started misfiring under heavy load/throttle/under boost. (I'm running the 5-Star Tuning 93Perf).
So I put the factory plugs back in until the M1240520T's came in.
Finally tonight I received the cold plugs (ordered from Levitown ford) which do seem to be packaged by Ford Performance.
The M-12405-20T is a plug manufactured by Denso (P#ITV24) used by Ford Performance in some of their performance packages. (This was immediately obvious after opening the package).
There are some subtle differences in the sizing of the plug which you can see in the pic and they are pre-gapped to .028(confirmed); but the plug body (seat to tip) is the same so I decided to give it a try.
All that said; I allowed the truck to warm up and gave it a 10mi light break-in and she is running beautifully.
In summary:
The Denso ITV24 can be used, works well and can be had for $10ea on Amazon. I spent about 6hrs and $180 to figure this out so hopefully someone else can benefit also.
Cheers
>>>>> Plug Pic Left to Right: (Stock) SP578, Denso ITV24{Ford M-12405-20T}, OEM Rplmnt SP594
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