Well started to mod a bit.
98 F150 5.4L E40D/4R100
Joined: Nov 2006
Posts: 28,535
Likes: 7,638
From: MI
Motorcraft and Autolite plugs are made at the same factory. Motorcrafts are built precisely to Ford specifications, - Autolites are the rejects. At least that's what it looks like lol.
Thread Starter
2015 F-150 3.5 ecoboost
Joined: Aug 2011
Posts: 2,168
Likes: 54
From: Canton Ohio
That said, some have said that they haven't had a problem Autolites. For a time, I thought they made improvements to their quality control. It was short lived, still hit and miss problems. I recall one user posting pictures of his new set after they quit working, - two of his plugs turned all kinds of funky colors on the outside. They clearly over heated....couldn't handle the heat range. Motorcraft and Autolite plugs are made at the same factory. Motorcrafts are built precisely to Ford specifications, - Autolites are the rejects. At least that's what it looks like lol.
Thread Starter
2015 F-150 3.5 ecoboost
Joined: Aug 2011
Posts: 2,168
Likes: 54
From: Canton Ohio
Finally got the time to change my plugs. As many people here have said DONT USE AUTOLITE PLUGS. they are bad lol. Switched all to motorcraft and truck running smooth as silk now.
Prob didn't help this was in cylinder #2
Junk autolite. Didn't even have 100 miles on it. Was Brand new.
Prob didn't help this was in cylinder #2
Junk autolite. Didn't even have 100 miles on it. Was Brand new.
resident post whore
Joined: Dec 2010
Posts: 102,624
Likes: 62
From: Montrose SD
Finally got the time to change my plugs. As many people here have said DONT USE AUTOLITE PLUGS. they are bad lol. Switched all to motorcraft and truck running smooth as silk now.
Prob didn't help this was in cylinder #2
Junk autolite. Didn't even have 100 miles on it. Was Brand new.
Prob didn't help this was in cylinder #2
Junk autolite. Didn't even have 100 miles on it. Was Brand new.
98 F150 5.4L E40D/4R100
Joined: Nov 2006
Posts: 28,535
Likes: 7,638
From: MI
Finally got the time to change my plugs. As many people here have said DONT USE AUTOLITE PLUGS. they are bad lol. Switched all to motorcraft and truck running smooth as silk now.
Prob didn't help this was in cylinder #2
Attachment 438414
Junk autolite. Didn't even have 100 miles on it. Was Brand new.
Prob didn't help this was in cylinder #2
Attachment 438414
Junk autolite. Didn't even have 100 miles on it. Was Brand new.
Thread Starter
2015 F-150 3.5 ecoboost
Joined: Aug 2011
Posts: 2,168
Likes: 54
From: Canton Ohio
Huh, so it wasn't dropped ? Box could have been dropped at a store or at the factory for that matter. Did you use a Snap on plug socket by chance ? There is a string of them that are hard on d- insulators. SK, F150 socket or tapped to an extension (still using that style lol).
resident post whore
Joined: Dec 2010
Posts: 102,624
Likes: 62
From: Montrose SD
It wasn't dropped by me. I looked at the plug before I put it in and didn't notice anything wrong with it. I used a deep well 5/8 impact socket. But not the impact lol. Used the tourqe ratchet set at 12 ft/lbs. just the same way I did with the motorcraft I just put in. I don't know what happen to this plug. Not a clue. It was fine when I put it in.
Senior Member
Joined: Mar 2014
Posts: 2,217
Likes: 45
Originally Posted by OTG02
It wasn't dropped by me. I looked at the plug before I put it in and didn't notice anything wrong with it. I used a deep well 5/8 impact socket. But not the impact lol. Used the tourqe ratchet set at 12 ft/lbs. just the same way I did with the motorcraft I just put in. I don't know what happen to this plug. Not a clue. It was fine when I put it in.
resident post whore
Joined: Dec 2010
Posts: 102,624
Likes: 62
From: Montrose SD
Just a heads up, 12 isn't enough torque on these plugs. They back out and then they eventually blow out and strip the threads on their way out. I believe I saw the new torque that ford updated to was 32 ft/lbs but I'm not 100% sure. You should be able to find it on the forum pretty easy.
