Spark plugs at 75K
06-04-2019, 05:56 PM
#1
Senior Member
Thread Starter
Spark plugs at 75K
I recently had my plugs changed as a preventative measure. I was totally shocked at how good they looked. All gaps were still at .032. They definitely could have made 100K.
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06-04-2019, 07:05 PM
#4
Are all of the stock plugs iridium? (I have a 2018 2.7.)
06-04-2019, 11:58 PM
#6
Senior Member
Platinum and iridium tipped sparks plugs almost always look fine and retain their gap. Even failing ones usually look fine. The days of plugs “starting to age” are long gone. They absolutely still fail but it’s almost always a go or no go situation. They don’t get “weak”. I do see quite a few of them show carbon tracking on the porcelain which is often the only sign of failure.
Should you replace your spark plugs? Absolutely. When they are causing a misfire or at their scheduled mileage.
Should you replace your spark plugs? Absolutely. When they are causing a misfire or at their scheduled mileage.
06-05-2019, 10:42 AM
#7
Senior Member
Yes factory plugs today are iridium tipped. I forget exactly when this swapped but it's been some time now. 2010 maybe.
before that you got platinum ones. Platinum ones work well too - I'd almost argue just as well.
however ecoboost motors are harder on the plugs than some others - actually common of most turbo applications.
cylinder pressures being higher than other applications and higher burn rates - tend to wear on the plugs more than some N/A motors will.
I plan on pulling mine out around 70K also. regardless of if it tune it
before that you got platinum ones. Platinum ones work well too - I'd almost argue just as well.
however ecoboost motors are harder on the plugs than some others - actually common of most turbo applications.
cylinder pressures being higher than other applications and higher burn rates - tend to wear on the plugs more than some N/A motors will.
I plan on pulling mine out around 70K also. regardless of if it tune it
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06-05-2019, 10:57 AM
#8
Senior Member
Platinum and iridium tipped sparks plugs almost always look fine and retain their gap. Even failing ones usually look fine. The days of plugs “starting to age” are long gone. They absolutely still fail but it’s almost always a go or no go situation. They don’t get “weak”. I do see quite a few of them show carbon tracking on the porcelain which is often the only sign of failure.
Should you replace your spark plugs? Absolutely. When they are causing a misfire or at their scheduled mileage.
Should you replace your spark plugs? Absolutely. When they are causing a misfire or at their scheduled mileage.
With the ecoboost engines and the higher pressures when run near max boost, and higher cylinder temps - they do wear on the plugs more. But more importantly due to those pressures in the cylinder and the need for quick fire and flame front propagation - they are more sensitive to plug gap too.
SO when that gap changes a few thousands - like with a electrode pit - then it can cause a misfire under load and the computer will start to compensate for it.
I do agree for many people the plugs should easily reach 100K miles - it's been field tested. But the harder you run them, the harder they are on the plugs.