Ecoboost Performance Forum

Ecoboost Performance => Troubleshooting, Maintenance, TSB Articles => Troubleshooting => Topic started by: painterpatt on March 10, 2014, 02:00:41 PM

Title: Code P301. 1 cylinder misfire?
Post by: painterpatt on March 10, 2014, 02:00:41 PM
This code came up twice this weekend after fairly hard acceleration. One passing, once getting on freeway. I have been able to feel like a "stutter" lately around 3k rpm. (My dyno graph showed it). Way worse now and finally a light flashing. (Went off). Any where to start? 36,500k 11 Flex   
Title: Re: Code P301. 1 cylinder misfire?
Post by: BiGMaC on March 10, 2014, 02:10:40 PM
I'd check plugs first.  If you can identify a cylinder with your equipment and switch plugs between cylinders.... or can change all the plugs.. to see if it resolve.

Coils could be a problem too i suppose.

A similar issue was discussed on another thread and ultimately proved to be an injector that was failing.
Title: Re: Code P301. 1 cylinder misfire?
Post by: painterpatt on March 10, 2014, 03:10:45 PM
Ngk's on order yesterday lol.
Title: Re: Code P301. 1 cylinder misfire?
Post by: curry67 on March 10, 2014, 07:13:56 PM
I had same problem switched out to new plugs. Its non existant now. I dont think ford knew how these direct injections acted on the original plugs.

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Title: Re: Code P301. 1 cylinder misfire?
Post by: painterpatt on March 15, 2014, 03:46:18 PM
Well swapped plugs out and look what i found at #1 And all the gaps were around .040  (https://scontent-b-mia.xx.fbcdn.net/hphotos-prn1/v/t34.0-12/1920017_10201670706677963_1898794496_n.jpg?oh=c32c8cea336436d0f49e4d00addab689&oe=53267F4C)
Title: Re: Code P301. 1 cylinder misfire?
Post by: SHOdded on March 15, 2014, 04:03:10 PM
Whoa, what the heck happened here?  Never seen this before.  Glad you got 'em swapped out.
Title: Re: Code P301. 1 cylinder misfire?
Post by: painterpatt on March 15, 2014, 04:17:24 PM
the ceramic broke loose, it moves up and down if you shake the plug lol. Found this to, http://www.autoserviceprofessional.com/article/92953/ford-gtdi-runs-rough (http://www.autoserviceprofessional.com/article/92953/ford-gtdi-runs-rough)
Title: Re: Code P301. 1 cylinder misfire?
Post by: SHOdded on March 15, 2014, 07:07:28 PM
Must be part of the reason they changed the plugs used for OEM builds.  Good find!
Title: Re: Code P301. 1 cylinder misfire?
Post by: glock-coma on March 15, 2014, 07:11:00 PM
Quote from: painterpatt on March 15, 2014, 04:17:24 PM
the ceramic broke loose, it moves up and down if you shake the plug lol. Found this to, http://www.autoserviceprofessional.com/article/92953/ford-gtdi-runs-rough (http://www.autoserviceprofessional.com/article/92953/ford-gtdi-runs-rough)



Its a good thing you caught that early.
If a piece of the ceramic broke off and went into the cylinder that could have been very bad.
Title: Re: Code P301. 1 cylinder misfire?
Post by: BiGMaC on March 15, 2014, 07:41:47 PM
Glad you found this... A real disaster waiting to happen!
Title: Re: Code P301. 1 cylinder misfire?
Post by: DJE624 on March 15, 2014, 07:55:48 PM
Ouch Pat!  Glad you found it sooner than later! 
Title: Re: Code P301. 1 cylinder misfire?
Post by: crash712us on March 15, 2014, 09:13:33 PM
It is when known problem with earlier plugs.


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Title: Re: Code P301. 1 cylinder misfire?
Post by: IHeartGroceries on March 16, 2014, 11:15:04 AM
Dang. That's lucky.

I've seen this quite a few times before. Denso plugs in particular were letting loose the ceramic insulators, but they chipped or shattered and dropped into the cylinder. I think we all know what happened from there. Lol!
At least your remained intact!

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Title: Re: Code P301. 1 cylinder misfire?
Post by: painterpatt on March 16, 2014, 11:23:25 AM
Yep, very lucky. It seems to run a little better too. Freaked out ALOT of the younger Tampa import scene at track last nite. Local 1/8th mi track. First up was against a BMW 335, no clue what he did but I ran 8.7 he ran a 13.3. haha. I guess a kid i work with was by staging and when I rolled up they were laughin about some idiot in the grocery getter gonna get his ass kicked by a Bmer. raced him 3 times, he went dark board on last 2 but still not even close. Took out a 10 Mustang GT twice and a few healthy Hondas.
Title: Re: Code P301. 1 cylinder misfire?
Post by: BiGMaC on March 16, 2014, 12:37:12 PM
Quote from: painterpatt on March 16, 2014, 11:23:25 AM
Yep, very lucky. It seems to run a little better too. Freaked out ALOT of the younger Tampa import scene at track last nite. Local 1/8th mi track. First up was against a BMW 335, no clue what he did but I ran 8.7 he ran a 13.3. haha. I guess a kid i work with was by staging and when I rolled up they were laughin about some idiot in the grocery getter gonna get his ass kicked by a Bmer. raced him 3 times, he went dark board on last 2 but still not even close. Took out a 10 Mustang GT twice and a few healthy Hondas.

Way to go Pat!... Great kill!  ;D     
The joys of owning a sleeper... it sandbags for you... make the wins sweeter!  :dance2:
... and that expert kid...  :black_eye: LOL
Title: Re: Code P301. 1 cylinder misfire?
Post by: DJE624 on March 16, 2014, 07:31:50 PM
Good going Pat!
Title: Re: Code P301. 1 cylinder misfire?
Post by: painterpatt on March 16, 2014, 08:41:40 PM
They took a pic soon as I see it I'll post it
Title: Re: Code P301. 1 cylinder misfire?
Post by: BiGMaC on March 16, 2014, 10:53:14 PM
Quote from: painterpatt on March 16, 2014, 08:41:40 PM
They took a pic soon as I see it I'll post it

.......  :popcorn:

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