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Idle Shake.?

UnloosedChewtoy said:
My 2014 Ram had iridium OEM plugs from the factory, and supposedly ever Ram Hemi has since the last half of that model year. Iridium conducts electricity better than platinum. Not sure their justification, but we do get the nicer plugs, hence the 100k spark plug change intervals. I have not pulled my 2020's plugs at all to check part #, but I can do that later out of curiosity.



+1. Every Hemi I've ever owned (up to four now) has had a tiny bit of intermittent shake when idling, including my 2020. Never enough to have move the RPM gauge needle, but enough for me to feel.
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Same with my Ram so I guess that's good to know. But like I said earlier...my Charger RT did the same thing until I put new Iridium plugs in at about 65k miles.
 
UnloosedChewtoy said:
I just did some research on the Mopar plugs for 2020 Hemis, part # SP143877AB according to a few sites I looked at.
People who buy them say the plugs themselves are NGK, with part # lzfr5ci-11 on them. Those are iridium plugs.
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Those part numbers you listed are on the Mopar website as replacement upgrade plugs...I still want to pull one of mine to be sure. Mainly because I usually don't trust OEM parts to be top notch lol
 
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UnloosedChewtoy said:
My 2014 Ram had iridium OEM plugs from the factory, and supposedly ever Ram Hemi has since the last half of that model year. Iridium conducts electricity better than platinum. Not sure their justification, but we do get the nicer plugs, hence the 100k spark plug change intervals. I have not pulled my 2020's plugs at all to check part #, but I can do that later out of curiosity.



+1. Every Hemi I've ever owned (up to four now) has had a tiny bit of intermittent shake when idling, including my 2020. Never enough to have move the RPM gauge needle, but enough for me to feel.
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Oh and Iridium not only conducts electricity better but it's a harder/more durable material.
 
I appreciate the responses guys! I really hope my stock plugs are already Iridium but something in the back of my head keeps saying they're not...it might be just from past experience, who knows lol
 
PowerJrod said:
Those part numbers you listed are on the Mopar website as replacement upgrade plugs...I still want to pull one of mine to be sure. Mainly because I usually don't trust OEM parts to be top notch lol
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Its always wise to question FCA and their choices. :ROFLMAO:
And I'm not being sarcastic!

Sometimes they surprise you, and you're like "wow, I can't believe they went down that route, thats fantastic" and other times its like "why couldn't they have spent 1 more penny on this part and made my life 100 times easier?"

I suppose that probably applies to every car manufacturer.
 
PowerJrod said:
Model number for those plugs are not Iridium...just looked it up on NGKs website.
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RHeller1 said:
what do they come up as?
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There may a bit of confusion here caused by Mopar.

ILZFR5E11 is the spark plug part # from the 2015 picture, unless my eyes deceive me. It is iridium. They were possibly made by NGK just for Mopar, and that part # didn't actually get sold directly to customers in NGK boxes. Some folks report that they got that part # when they ordered Mopar boxed plugs for their 4th gens, but now-a-days when you order the Mopar boxed plugs, you're reportedly just paying more for ILZFR5CI11 plugs.
ILZFR5C11 is the nickel spark plug that fits 2015 (and other) Hemis. If you look at this plug under our Hemis, you'll see a note about OEM plugs being iridium extended service plugs. Capture.JPG
ILZFR5CI11 is their Laser Iridium spark plug that fits 2015 (and other) Hemis.

If I was going to do plugs, I'd look at the new Ruthenium plugs. Don't conduct quite as well as Iriidium, but better than Platinum, and harder than both.
 
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Here is what I see from NGK "Dual Plug; 16 Req'd; Optional NICKEL plug (30,000 mi/48,000 km interval). FCA OEM plug is IRIDIUM extended service plug (100,000 mi/160,000 km interval)"
 
UnloosedChewtoy said:
Its always wise to question FCA and their choices. :ROFLMAO:
And I'm not being sarcastic!

Sometimes they surprise you, and you're like "wow, I can't believe they went down that route, thats fantastic" and other times its like "why couldn't they have spent 1 more penny on this part and made my life 100 times easier?"

I suppose that probably applies to every car manufacturer.
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Exactly! Haha
 
RHeller1 said:
Here is what I see from NGK "Dual Plug; 16 Req'd; Optional NICKEL plug (30,000 mi/48,000 km interval). FCA OEM plug is IRIDIUM extended service plug (100,000 mi/160,000 km interval)"
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They're probably Platinum or some new hybrid spark plug lol. I wonder if the OEM "Iridium" plugs are similar to OEM all Terrain tires in terms of re-manufactured or "rebuilt", lower quality. I have a hard time wrapping my head around FCA actually paying the cost for brand new perfect NGK Iridium plugs at the factory. Who knows. I'm still thinking the plugs are the culprit for my Hemi Seizure.
 
You just can't accept that they are iridium plugs? NGK does make Iridium oem plugs. If you want to pull your plugs, by all means, go ahead, I am not saying your shake is not from a bad plug. What I am saying is they are iridium plugs not some hybrid thing. When your buying the quantity that FCA buys, I believe the cost to be minimal. FCA sends out a spec and suppliers bid on it, making the cost extremely low.
 
UnloosedChewtoy said:
There may a bit of confusion here caused by Mopar.

ILZFR5E11 is the spark plug part # from the 2015 picture, unless my eyes deceive me. It is iridium. They were possibly made by NGK just for Mopar, and that part # didn't actually get sold directly to customers in NGK boxes. Some folks report that they got that part # when they ordered Mopar boxed plugs for their 4th gens, but now-a-days when you order the Mopar boxed plugs, you're reportedly just paying more for ILZFR5CI11 plugs.
ILZFR5C11 is the nickel spark plug that fits 2015 (and other) Hemis. If you look at this plug under our Hemis, you'll see a note about OEM plugs being iridium extended service plugs. View attachment 73117
ILZFR5CI11 is their Laser Iridium spark plug that fits 2015 (and other) Hemis.

If I was going to do plugs, I'd look at the new Ruthenium plugs. Don't conduct quite as well as Iriidium, but better than Platinum, and harder than both.
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Put Ruthenium plugs in my Titan at 150k after using NGK Iridiums. They ran great, and I noticed a small bump in mpg's. That was after only 50k miles on the Iridiums between 100k-150k.
 
PowerJrod said:
Negative. the first number you listed is a Mopar part which are only replacement options for the OEM plugs, granted those are rebranded NGK Iridium plugs...they are absolutely not the stock plugs. They're either Nickel or Platinum. No Manufacturer in the history of American auto makers has ever used iridium plugs as OEM in any truck. (I just did a little research on it). Of course...my research could be incorrect...but I'm pretty sure no one here has pulled out their plugs on their 5th gen to find out yet.
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Nope, stock is NGK LZ (Laser Iridium) NGK is the OEM for FCA plugs
NGK 92145 Laser Iridium Info
Dual Plug; Gap 0.044"; Actual OE Manufacturer
 
RHeller1 said:
You just can't accept that they are iridium plugs? NGK does make Iridium oem plugs. If you want to pull your plugs, by all means, go ahead, I am not saying your shake is not from a bad plug. What I am saying is they are iridium plugs not some hybrid thing. When your buying the quantity that FCA buys, I believe the cost to be minimal. FCA sends out a spec and suppliers bid on it, making the cost extremely low.
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Lol it just seems weird how Ram would be using this while every other Manufacturer is using copper, nickel or Platinum. But you're point is well taken
 
LaxDfns15 said:
Put Ruthenium plugs in my Titan at 150k after using NGK Iridiums. They ran great, and I noticed a small bump in mpg's. That was after only 50k miles on the Iridiums between 100k-150k.
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Which Ruthenium plugs did you use? I saw that there's two different types.
 
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