spark plugs
Moderator
Joined: Jan 2004
Posts: 13,851
Likes: 111
From: SW Va
Only noticeably faster starts, smoother idle in "N" & no random miss when on a hard lug when towing.
New User
Joined: Jun 2010
Posts: 11
Likes: 0
From: detroit
Spark Plugs
Hey Ranger dudes,
I am the tech manager at Autolite. Interesting forum with some great and not so great information. I run Autolite XP104's in my 98 Ranger 4.0, it has 185k on the clock and runs great. The truck originally came with double platinum plugs, Ford (and many other automakers) now recommend using an iridium fine wire spark plug with a platinum pad on the side wire. That would be our XP spark plug. They retail for around 5.99-6.99 each. If you really want to know all about spark plugs, heat range, metallurgy and DIS ignitions, go to autolite.com and watch the autolite challenge videos. And yea, that ugly mug spouting off is me.
Peace
I am the tech manager at Autolite. Interesting forum with some great and not so great information. I run Autolite XP104's in my 98 Ranger 4.0, it has 185k on the clock and runs great. The truck originally came with double platinum plugs, Ford (and many other automakers) now recommend using an iridium fine wire spark plug with a platinum pad on the side wire. That would be our XP spark plug. They retail for around 5.99-6.99 each. If you really want to know all about spark plugs, heat range, metallurgy and DIS ignitions, go to autolite.com and watch the autolite challenge videos. And yea, that ugly mug spouting off is me.
Peace
New User
Joined: Nov 2010
Posts: 20
Likes: 0
In my case the previous owner had installed the autolite dp's and the truck was giving him issues with misfires, bogging, etc... I removed the autolite dp's and tried the motorcraft plugs and the problem was resolved...
Fleet Mechanic
Joined: Feb 2007
Posts: 1,716
Likes: 0
From: Boston, MA
* maybe the autolites were not gap properly? how long had they been in there......a lot of sellers lie about the maintenance?..........the only horror stories in these fords about plugs that I know of come from Bosch
also if the PO put to many fuel additives in the truck those can trash plugs, seafoam is know to do that.....
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New User
Joined: Nov 2010
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powersmoked - its a 4.0L OHV. I replaced the dp's with the Motorcraft OE Finewire Single Platinums, part no. SP486, I believe. He had just replaced the plugs and wires... he provided receipts when I got it off him. Not sure the plugs were the definite cause of the misfire, but that is what appears to have resolved it in my case.
Postmaster
Joined: Oct 2009
Posts: 3,432
Likes: 7
Just because he just did it, doesn't mean it was done right. He may not have used the right plugs, one could have had a cracked insulator, a boot was not installed properly, etc. All your story states is that you do better work that the previous installer. The Autolite and Motorcraft plugs are 100% identical.
Moderator
Joined: Jan 2004
Posts: 13,851
Likes: 111
From: SW Va
Hey Ranger dudes,
I am the tech manager at Autolite. Interesting forum with some great and not so great information. I run Autolite XP104's in my 98 Ranger 4.0, it has 185k on the clock and runs great. The truck originally came with double platinum plugs, Ford (and many other automakers) now recommend using an iridium fine wire spark plug with a platinum pad on the side wire. That would be our XP spark plug. They retail for around 5.99-6.99 each. If you really want to know all about spark plugs, heat range, metallurgy and DIS ignitions, go to autolite.com and watch the autolite challenge videos. And yea, that ugly mug spouting off is me.
Peace
I am the tech manager at Autolite. Interesting forum with some great and not so great information. I run Autolite XP104's in my 98 Ranger 4.0, it has 185k on the clock and runs great. The truck originally came with double platinum plugs, Ford (and many other automakers) now recommend using an iridium fine wire spark plug with a platinum pad on the side wire. That would be our XP spark plug. They retail for around 5.99-6.99 each. If you really want to know all about spark plugs, heat range, metallurgy and DIS ignitions, go to autolite.com and watch the autolite challenge videos. And yea, that ugly mug spouting off is me.
Peace
I watched all six video modules, After I figured out where they were located, (at the bottom of the "learn more" tag), then a way to get past the Region/Langage page, that wouldn't work to foward me & open the video module page for viewing.
Maybe you could have someone look into that Region/Language page to see whats up with it not fowarding after a region/language is chosen.
Anyway, I found the english video page here.
Autolite Spark Plugs - Choose your region | Autolite®
Think I'll start a spark plug tutorial thread & post a link to these videos & ask that the thread be considered for a "stickey" in this forums Tech Info thread.
New User
Joined: Nov 2010
Posts: 20
Likes: 0
Just because he just did it, doesn't mean it was done right. He may not have used the right plugs, one could have had a cracked insulator, a boot was not installed properly, etc. All your story states is that you do better work that the previous installer. The Autolite and Motorcraft plugs are 100% identical.
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