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04 F250 5.4L 158,000mi on spark plugs. #4488885
08/14/17 11:58 PM
08/14/17 11:58 PM
Joined: Apr 2016
Posts: 781
Specific Ocean
Kibitoshin Offline OP
Kibitoshin  Offline OP
Joined: Apr 2016
Posts: 781
Specific Ocean
Had to take home a company truck 2004 Ford F250 with the 5.4L 2v and 6 speed manual transmission and right off the bat it would shudder so bad and lose power under certain speed and engine load. Poor throttle response when you stab the pedal to the floor, etc. Connected the scanguage to pull codes and one of them was a P0306. Since this is a company truck I am not allowed to perform any of my own maintenance but wanted to see if just changing out that one spark plug solves the power issues. The truck has 158,000mi on it and and I'm assuming this is the original single platinum spark plug from cyl 5 and 6. Company owner says he will bring the truck in for service but who knows when.

Spark plug 5 on the top, 6 on the bottom:




#6 and #5


Hadn't had the chance to drive it around. Throttle response seems to be better when stabbing the throttle to the floor.


Shin Gekiretsu Shin'ou'hou
01 Toyota Tundra 2WD V8 4.7L
02 Chevy Silverado C1500 V8 5.3L
Re: 04 F250 5.4L 158,000mi on spark plugs. [Re: Kibitoshin] #4488891
08/15/17 12:23 AM
08/15/17 12:23 AM
Joined: Jun 2012
Posts: 1,757
USA
oldhp Offline
oldhp  Offline
Joined: Jun 2012
Posts: 1,757
USA
Stock ignition systems are pretty darn good......ain't they. Looks like all goody has been used up in those plugs.


2018 RAM 1500 3.6/8 speed.
2017 Jeep Sahara Unlimited 3.6
"U kan't fixe it......if'n it ain't broke."
Re: 04 F250 5.4L 158,000mi on spark plugs. [Re: Kibitoshin] #4488921
08/15/17 02:47 AM
08/15/17 02:47 AM
Joined: Jun 2011
Posts: 1,803
Crawfordville FL
SilverFusion2010 Offline
SilverFusion2010  Offline
Joined: Jun 2011
Posts: 1,803
Crawfordville FL
I would change all the plugs and send him the bill. Or refuse to drive a vehicle that is arguably dangerous.


2010 Ford Fusion SE 3.0L V6, 181 miles M1 HM 10w-30
Re: 04 F250 5.4L 158,000mi on spark plugs. [Re: Kibitoshin] #4489046
08/15/17 07:30 AM
08/15/17 07:30 AM
Joined: Sep 2014
Posts: 1,487
Toronto Canada
WobblyElvis Offline
WobblyElvis  Offline
Joined: Sep 2014
Posts: 1,487
Toronto Canada
You are taking a risk working on someone's vehicle without their permission. What if one of the plugs pulled the threads out the head when it was removed?

I understand you have good intentions but others may not see it that way. Be careful.

Re: 04 F250 5.4L 158,000mi on spark plugs. [Re: Kibitoshin] #4489047
08/15/17 07:34 AM
08/15/17 07:34 AM
Joined: Dec 2006
Posts: 4,220
Port Orange, Florida
Panzerman Offline
Panzerman  Offline
Joined: Dec 2006
Posts: 4,220
Port Orange, Florida
The company truck I am driving right now a 2005 Ford F150 with a 4.6 has 233,678 miles on it and I am pretty sure it's the original spark plugs and ATF. Company trucks at this company usually don't get any other maintenance other than oil changes, tire rotation and air cleaners. The fact that it probably idles 4-5 hours a a day. It runs good yet. Getting a little tired on take off but it's only 4.6.
Uses no oil between oil changes.



2006 Dodge Ram 2500 Hemi 4x4
2016 Dodge Challenger Scat Pack
Re: 04 F250 5.4L 158,000mi on spark plugs. [Re: Kibitoshin] #4489099
08/15/17 08:33 AM
08/15/17 08:33 AM
Joined: May 2012
Posts: 4,531
Baltimore, Maryland, USA
zzyzzx Offline
zzyzzx  Offline
Joined: May 2012
Posts: 4,531
Baltimore, Maryland, USA
Did you measure the gap on those old plugs?

Re: 04 F250 5.4L 158,000mi on spark plugs. [Re: Kibitoshin] #4489149
08/15/17 09:46 AM
08/15/17 09:46 AM
Joined: Dec 2006
Posts: 54
North Carolina, USA
sohccammer427 Offline
sohccammer427  Offline
Joined: Dec 2006
Posts: 54
North Carolina, USA
Those may not be what was installed at the factory. I thought the Motorcraft agsf22wm was a replacement for AWSF22E?

More threads on the newer plug. Anyhow I believe plugs from the factory have some blue paint on the terminal indicating such. At least mine did.


2015 VW Passat TDi 6 Speed Manual
2017 Colorado Duramax
Re: 04 F250 5.4L 158,000mi on spark plugs. [Re: Kibitoshin] #4489159
08/15/17 10:00 AM
08/15/17 10:00 AM
Joined: Mar 2006
Posts: 2,320
in the shop
sw99 Offline
sw99  Offline
Joined: Mar 2006
Posts: 2,320
in the shop
Keep in mind also that the COP boots can and will deteriorate and cause a misfire. My old 2001 F150 bucked under load when this happened also. My plugs were fine, it was a boot.


2016 Nissan Versa S 1.6L
2018 Subaru Outback 2.5i
2019 Ford F250 6.7L CCSB

Re: 04 F250 5.4L 158,000mi on spark plugs. [Re: Kibitoshin] #4489206
08/15/17 10:59 AM
08/15/17 10:59 AM
Joined: Feb 2013
Posts: 11,081
Phoenix, AZ
Nick1994 Online content
Nick1994  Online Content
Joined: Feb 2013
Posts: 11,081
Phoenix, AZ
What was the gap? Looks huge


2015 Hyundai Sonata 2.4L 88k Motorcraft Synthetic Blend 5w30 & OEM
2000 Toyota Camry 2.2L 231k Valvoline 5w30 & Fram Ultra
1996 Jeep Cherokee 4.0L 147k Mobil 1 HM 10w40 & Fram Ultra
Re: 04 F250 5.4L 158,000mi on spark plugs. [Re: Kibitoshin] #4489314
08/15/17 12:58 PM
08/15/17 12:58 PM
Joined: Jun 2014
Posts: 2,730
Phoenix, Arizona - USA
SirTanon Offline
SirTanon  Offline
Joined: Jun 2014
Posts: 2,730
Phoenix, Arizona - USA
When I changed the plugs on my Fusion @215,000 miles, what I found was the factory plugs.. and they were not Motorcraft. They were 'FoMoCo' plugs.

I verified with the local Ford service manager, too. The dead giveaway was the teal-ish dots of paint on the top of each plug... plus the 'FoMoCo' on the side. What you pulled out look like standard aftermarket Motorcraft plugs.


2010 Ford Fusion SE - 2.5 liter/6F35 Trans - 266,000mi
2014 Nissan Altima SL - 2.5 liter/CVT - 60,000mi
Re: 04 F250 5.4L 158,000mi on spark plugs. [Re: Kibitoshin] #4489959
08/16/17 07:28 AM
08/16/17 07:28 AM
Joined: Mar 2010
Posts: 5,368
Iowa
The_Eric Online content
The_Eric  Online Content
Joined: Mar 2010
Posts: 5,368
Iowa
Barring an unseen crack or other deformity in the plug, I'd say either a coil or the coil boot.


2005 Lincoln Aviator 4.6 DOHC
2000 Honda Accord 2.3
2001 Hyundai Elantra 2.0
1979 Ford F-150 351M
Re: 04 F250 5.4L 158,000mi on spark plugs. [Re: SirTanon] #4490064
08/16/17 09:46 AM
08/16/17 09:46 AM
Joined: Oct 2009
Posts: 3,947
Ohio
L_Sludger Offline
L_Sludger  Offline
Joined: Oct 2009
Posts: 3,947
Ohio
Originally Posted By: SirTanon
When I changed the plugs on my Fusion @215,000 miles, what I found was the factory plugs.. and they were not Motorcraft. They were 'FoMoCo' plugs.

I verified with the local Ford service manager, too. The dead giveaway was the teal-ish dots of paint on the top of each plug... plus the 'FoMoCo' on the side. What you pulled out look like standard aftermarket Motorcraft plugs.
So there may be some shady opportunity for business selling these plugs on the black market - complete with labeling AND the QC inspector's dab of paint. The paint is there usually to ensure that someone or something did a final check to verify torque values.


too many cars and oil combinations to list in 150 characters or less

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