Spark plugs at 40,000 to correct misfire codes

[KnoxGnater]

Just sharing my experience as folks will start to accrue mileage.

i started having hesitation and obvious misfire conditions under acceleration. It finally popped some codes, which came up as multiple cylinder misfire, and all individual misfire codes P030x on my handheld reader. ( They are cheap, get one)

I refilled with premium gas, reset the codes and had no issues for a week. Then a trip on the blue ridge parkway led to serious episode, we limped home. Same codes. Fearing further damage I had it towed to the dealer, they checked the usual suspects, inspected and gapped the plugs, and reset the control modules and what they called “The misfire detection algorithm “. All covered by warranty.

It’s been OK since picking it up, but I changes plugs today anyway.

I ordered off Rock auto, it was half the price of local parts stores. Easy job, took 30 min. NGK LTR6BHX 90495 Ruthenuim plugs.

I’m confident low octane fuel, high altitude driving, and these plugs were the root cause. I’ll be running high test gas from now on.

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[mpeugeot]

Ecoboost motors are known for eating plugs, and although mine hasn't, it was a surprise to make it 100k miles on the factory plugs. 40k-50k is pretty normal spark plug life on an Ecoboost. This is the first thing I check on any Ecoboost with a misfire.

 

[Brian_B]

Just curious: knowing you used standard (not Premium) gas, did you tend toward Top Tier or brand name gas, or was it just whatever was cheapest, or didn't pay attention?

Just asking, knowing that Premium doesn't necessarily mean "good quality" gas. And I'll also admit Top Tier doesn't necessarily mean it's great either. But it's easy to conflate the two when they aren't necessarily related.

 

[KnoxGnater]

Just curious: knowing you used standard (not Premium) gas, did you tend toward Top Tier or brand name gas, or was it just whatever was cheapest, or didn't pay attention?

Just asking, knowing that Premium doesn't necessarily mean "good quality" gas. And I'll also admit Top Tier doesn't necessarily mean it's great either. But it's easy to conflate the two when they aren't necessarily related.

most of my fills ups are at Food City grocery store using points. No idea where they get the gas. Ironically the first misfires started just after a Kroger fill up north of Atlanta.

 

[thegoatman]

If you’re not using top tier, I’d hit it with a bottle of chevron techron. Maybe the Kroger started to loosen up the deposits.

 

[BigMeatsBronco]

I replaced my first set of plugs at only 25k...looked similar to pics above...

 

[popo_patty]

Just sharing my experience as folks will start to accrue mileage.

i started having hesitation and obvious misfire conditions under acceleration. It finally popped some codes, which came up as multiple cylinder misfire, and all individual misfire codes P030x on my handheld reader. ( They are cheap, get one)

I refilled with premium gas, reset the codes and had no issues for a week. Then a trip on the blue ridge parkway led to serious episode, we limped home. Same codes. Fearing further damage I had it towed to the dealer, they checked the usual suspects, inspected and gapped the plugs, and reset the control modules and what they called “The misfire detection algorithm “. All covered by warranty.

It’s been OK since picking it up, but I changes plugs today anyway.

I ordered off Rock auto, it was half the price of local parts stores. Easy job, took 30 min. NGK LTR6BHX 90495 Ruthenuim plugs.

I’m confident low octane fuel, high altitude driving, and these plugs were the root cause. I’ll be running high test gas from now on.

Looks like you have two extra plugs. That’s the problem.

 

[BadlandsA51]

Just sharing my experience as folks will start to accrue mileage.

i started having hesitation and obvious misfire conditions under acceleration. It finally popped some codes, which came up as multiple cylinder misfire, and all individual misfire codes P030x on my handheld reader. ( They are cheap, get one)

I refilled with premium gas, reset the codes and had no issues for a week. Then a trip on the blue ridge parkway led to serious episode, we limped home. Same codes. Fearing further damage I had it towed to the dealer, they checked the usual suspects, inspected and gapped the plugs, and reset the control modules and what they called “The misfire detection algorithm “. All covered by warranty.

It’s been OK since picking it up, but I changes plugs today anyway.

I ordered off Rock auto, it was half the price of local parts stores. Easy job, took 30 min. NGK LTR6BHX 90495 Ruthenuim plugs.

I’m confident low octane fuel, high altitude driving, and these plugs were the root cause. I’ll be running high test gas from now on.

Not uncommon on Ecoboost engines. The boost makes it harder to jump the plug gap so coil voltage goes up to make a hotter spark to get across the gap. That hotter spark erodes the electrodes quicker and the gap gets wider and too wide for the coils to fire under heavy loads, then the misfiring starts. If you have a heavy foot it’s not uncommon for plugs to be done at 35 to 40,000 miles.

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