Sparkplug V8 replacement
Thread Starter
Member
Joined: Dec 2013
Posts: 85
Likes: 2
From: Nashville, TN
2001 SuperCrew King Ranch 4x4 5.4 V-8 150,600miles
Have recently gotten 2 different misfire codes, P0305 and P0308. When I got the codes, I could audibly hear the misfire (only after cold start on more chilly mornings) but it will go away after he engine runs for about 30 seconds.
I am planning on replacing the plugs and coils coming up, and with the research I've done, the only concern I've come across is the plugs breaking off in the hole. Have read that using Air tools to remove the plugs works best to avoid this, but are their other things I can do to help lower this possibility? Is it necessary to replace the coils with the plugs?
What other things should I be careful of, and anything in particular I should keep an eye out when changing the plugs, like signs of any coolant getting in cylinders or small problems like that.
Plan on using motorcraft parts, and wondering where the best prices for these can be found? I have used 1AAuto for some previous part replacements and they have provided great prices and great parts. Was planning on getting the coils through there.
I have watched some YouTube videos on the whole procedure, so I'm not worries about that mechanic side, just want to make sure while I'm up there I address and inspect everything I should.
Thank you.
Have recently gotten 2 different misfire codes, P0305 and P0308. When I got the codes, I could audibly hear the misfire (only after cold start on more chilly mornings) but it will go away after he engine runs for about 30 seconds.
I am planning on replacing the plugs and coils coming up, and with the research I've done, the only concern I've come across is the plugs breaking off in the hole. Have read that using Air tools to remove the plugs works best to avoid this, but are their other things I can do to help lower this possibility? Is it necessary to replace the coils with the plugs?
What other things should I be careful of, and anything in particular I should keep an eye out when changing the plugs, like signs of any coolant getting in cylinders or small problems like that.
Plan on using motorcraft parts, and wondering where the best prices for these can be found? I have used 1AAuto for some previous part replacements and they have provided great prices and great parts. Was planning on getting the coils through there.
I have watched some YouTube videos on the whole procedure, so I'm not worries about that mechanic side, just want to make sure while I'm up there I address and inspect everything I should.
Thank you.
Last edited by 2001KR4xx4; Dec 5, 2015 at 06:47 PM.
5 Year Member
Joined: May 2015
Posts: 4,175
Likes: 1,206
2001 SuperCrew King Ranch 4x4 5.4 V-8 150,600miles
Have recently gotten 2 different misfire codes, P0305 and P0308. When I got the codes, I could audibly hear the misfire (only after cold start on more chilly mornings) but it will go away after he engine runs for about 30 seconds.
I am planning on replacing the plugs and coils coming up, and with the research I've done, the only concern I've come across is the plugs breaking off in the hole. Have read that using Air tools to remove the plugs works best to avoid this, but are their other things I can do to help lower this possibility? Is it necessary to replace the coils with the plugs?
What other things should I be careful of, and anything in particular I should keep an eye out when changing the plugs, like signs of any coolant getting in cylinders or small problems like that.
Plan on using motorcraft parts, and wondering where the best prices for these can be found? I have used 1AAuto for some previous part replacements and they have provided great prices and great parts. Was planning on getting the coils through there.
I have watched some YouTube videos on the whole procedure, so I'm not worries about that mechanic side, just want to make sure while I'm up there I address and inspect everything I should.
Thank you.
Have recently gotten 2 different misfire codes, P0305 and P0308. When I got the codes, I could audibly hear the misfire (only after cold start on more chilly mornings) but it will go away after he engine runs for about 30 seconds.
I am planning on replacing the plugs and coils coming up, and with the research I've done, the only concern I've come across is the plugs breaking off in the hole. Have read that using Air tools to remove the plugs works best to avoid this, but are their other things I can do to help lower this possibility? Is it necessary to replace the coils with the plugs?
What other things should I be careful of, and anything in particular I should keep an eye out when changing the plugs, like signs of any coolant getting in cylinders or small problems like that.
Plan on using motorcraft parts, and wondering where the best prices for these can be found? I have used 1AAuto for some previous part replacements and they have provided great prices and great parts. Was planning on getting the coils through there.
I have watched some YouTube videos on the whole procedure, so I'm not worries about that mechanic side, just want to make sure while I'm up there I address and inspect everything I should.
Thank you.
You dont have an engine broken plugs were issue on , that started in 2004
Rockauto.com is a favorite place
Typically dont replace coils unless its bad, but usually a coil misfires under acceleration first in my experience, not at idle
two at the same time, cold, screams something else to me. intake leaks? check all PCV and EGR hoses for good condition first.
what do fuel trim look like?
Last edited by mbb; Dec 5, 2015 at 07:05 PM.
Senior Member
Joined: Jun 2012
Posts: 2,334
Likes: 109
I'd torque the plugs down to 28ft-lbs. While these motors don't have split plug issues they will shoot plugs out of the head if installed incorrectly.
Here's some evidence to back up my claim
https://www.f150forum.com/f6/spark-plug-change-191885/
Also note: in this thread I posted a pick of the Chilton's manual and said I was going to use factory specs. I have since changed my opinion and plan on using the higher torque specs when I do my 100k spark plug change.
Here's some evidence to back up my claim
https://www.f150forum.com/f6/spark-plug-change-191885/
Also note: in this thread I posted a pick of the Chilton's manual and said I was going to use factory specs. I have since changed my opinion and plan on using the higher torque specs when I do my 100k spark plug change.
Last edited by me1234; Dec 5, 2015 at 07:48 PM.
Thread Starter
Member
Joined: Dec 2013
Posts: 85
Likes: 2
From: Nashville, TN
no air tools to replace plugs You dont have an engine broken plugs were issue on , that started in 2004 Rockauto.com is a favorite place Typically dont replace coils unless its bad, but usually a coil misfires under acceleration first in my experience, not at idle two at the same time, cold, screams something else to me. intake leaks? check all PCV and EGR hoses for good condition first. what do fuel trim look like?
I will check all the hoses and connection points for a good seal.
What do you mean "fuel trim" and how would I go about checking that?
Senior Member
Joined: Jul 2013
Posts: 3,266
Likes: 187
From: Mooresville indiana
I get my stuff from tascaparts.com look into it they only have Ford parts. Torque the plugs to 28 ft pounds no antiseize or anything on the plugs. Use only motorcraft parts no air tools they don't break.and good luck.
1A Auto Parts
Joined: Apr 2010
Posts: 7,252
Likes: 475
2001 SuperCrew King Ranch 4x4 5.4 V-8 150,600miles
Have recently gotten 2 different misfire codes, P0305 and P0308. When I got the codes, I could audibly hear the misfire (only after cold start on more chilly mornings) but it will go away after he engine runs for about 30 seconds.
I am planning on replacing the plugs and coils coming up, and with the research I've done, the only concern I've come across is the plugs breaking off in the hole. Have read that using Air tools to remove the plugs works best to avoid this, but are their other things I can do to help lower this possibility? Is it necessary to replace the coils with the plugs?
What other things should I be careful of, and anything in particular I should keep an eye out when changing the plugs, like signs of any coolant getting in cylinders or small problems like that.
Plan on using motorcraft parts, and wondering where the best prices for these can be found? I have used 1AAuto for some previous part replacements and they have provided great prices and great parts. Was planning on getting the coils through there.
I have watched some YouTube videos on the whole procedure, so I'm not worries about that mechanic side, just want to make sure while I'm up there I address and inspect everything I should.
Thank you.
Have recently gotten 2 different misfire codes, P0305 and P0308. When I got the codes, I could audibly hear the misfire (only after cold start on more chilly mornings) but it will go away after he engine runs for about 30 seconds.
I am planning on replacing the plugs and coils coming up, and with the research I've done, the only concern I've come across is the plugs breaking off in the hole. Have read that using Air tools to remove the plugs works best to avoid this, but are their other things I can do to help lower this possibility? Is it necessary to replace the coils with the plugs?
What other things should I be careful of, and anything in particular I should keep an eye out when changing the plugs, like signs of any coolant getting in cylinders or small problems like that.
Plan on using motorcraft parts, and wondering where the best prices for these can be found? I have used 1AAuto for some previous part replacements and they have provided great prices and great parts. Was planning on getting the coils through there.
I have watched some YouTube videos on the whole procedure, so I'm not worries about that mechanic side, just want to make sure while I'm up there I address and inspect everything I should.
Thank you.
Tony
4.6, The True Triton
Joined: Nov 2011
Posts: 337
Likes: 14
From: Michigan
1aauto is a great place to get the parts and especially the coils cheap. Please, please do NOT use air tools to remove the plugs.
as Mbb said, these are not the engines that have this problem. Make sure to apply anti seize on the new plugs and double check the gap. Even if they are pre gaped.
as Mbb said, these are not the engines that have this problem. Make sure to apply anti seize on the new plugs and double check the gap. Even if they are pre gaped.
