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4.0L OHV & SOHC V6 Tech General discussion of 4.0L OHV and SOHC V6 Ford Ranger engines.

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  #1  
Old 08-19-2006
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spark plugs

What type of performance spark plugs do you guys use
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  #2  
Old 08-20-2006
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I use denso iriduim, I have no complaints.
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  #3  
Old 08-20-2006
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Bosch Platinums, I replaced the motorcrafts @ 25k miles. Maybe it was all in my head, but felt like better detonations.
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  #4  
Old 08-20-2006
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i have used autolite double platiums in my truck and i like them
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  #5  
Old 08-20-2006
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Bosch Platinum +4 here.

I changed the stock plugs with Motorcraft double platinums. I had those in my truck for about a year and a half and had some issues with them. Every 4-5 months, the gap would go from 0.042" to 0.070" and wider. My truck also pinged pretty bad with 87 octane and even with 93 octane so I ditched them and went to the Bosch plugs. Haven't had any issues in 9+ months.
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  #6  
Old 08-20-2006
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I have some ngk iriadiums in my car and there like six months old or so and there starting to go so i wanted to upgrade my spark plugs in my truck with some performance and just wanted to know if there were any problems
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  #7  
Old 08-20-2006
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lol I put NGK's in my three-wheeler only cuz they're cheap and they're fouled out quite often. Helps to have a spare or two, then I glass bead em all at once.
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  #8  
Old 08-22-2006
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well good luck with your three wheeler my plugs cost me something like $11.00 for four when i could have spent 5 bucks for four
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  #9  
Old 08-22-2006
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I get them at cost too =]
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  #10  
Old 08-23-2006
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dam that would be nice so i could replace mine in my car lol
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  #11  
Old 09-05-2006
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In my last car I pulled NGK's and put in Bosch PLatinum +4s, the smoothness and acceleration difference was there, even to passengers. I recommend Bosch any day.
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  #12  
Old 09-05-2006
D.
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NGK TR55-1. I swiched back to platinums for burning Ethanol recently.
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  #13  
Old 09-05-2006
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arent the plats bad with juice D?
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  #14  
Old 09-05-2006
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I wont run anything but stock plugs. Unless you have a supercharger or are spraying you dont need any more than stock.
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  #15  
Old 09-05-2006
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i use ngk for my dirtbike only,not my truck though, i use motocraft plugs
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  #16  
Old 09-05-2006
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Bosch were the cause of a mis-fire with my 3.0L. The mis-fire was eliminated when I went with Motorcraft double platinums.
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  #17  
Old 09-05-2006
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Quote:
Originally Posted by barrman
arent the plats bad with juice D?
They last less then 2 seconds before they start having their coating melt, thus the use of a copper plug and a lower temp.
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  #18  
Old 09-14-2006
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I have tried many of the available plugs and have found the best performance and mpg with the plain old motorcraft factory plugs. I have a 2.3L though. I use the agsf32-fec plugs.
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  #19  
Old 09-19-2006
2oo1Ranger4x4
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Quote:
Originally Posted by Takeda
Bosch were the cause of a mis-fire with my 3.0L. The mis-fire was eliminated when I went with Motorcraft double platinums.
+1

I've seen this happen many times.

As much as I love performance, I have to say that Bosch is not good for Rangers. Many people have had problems down the road with these plugs.

Stick with Motorcraft. And if it makes you feel better (like I did) get a premium Motorcraft plug. (probably all in my head, but hey...)
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  #20  
Old 02-08-2008
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Spark Plugs For 2002 Ranger Xlt

Ok, I just got some Bosch spark plugs and I cannot find where to put them when I'm looking at the engine. Are they under the "4.0 liter" case, or burried in the engine somewhere? If anyone knows exactly how to get to them,just reply or send me an email, and that would be awesome. Thanks
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  #21  
Old 02-08-2008
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Also, I love how I asked the guy at autozone if Bosch was REALLY the brand that I wanted to put in my truck and he said, "Yes." The answer is probably no.
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  #22  
Old 02-08-2008
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dude, dig up a 2 yr old thread? BOsche's suck in our trucks....go motorcraft or autolite.
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  #23  
Old 02-09-2008
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Quote:
Originally Posted by D4przyoj View Post
Ok, I just got some Bosch spark plugs and I cannot find where to put them when I'm looking at the engine. Are they under the "4.0 liter" case, or burried in the engine somewhere? If anyone knows exactly how to get to them,just reply or send me an email, and that would be awesome. Thanks
Buying Bosch when there are so many threads telling you how bad they are in a Ford product, and not knowing where they go.........I suggest getting somebody else to install the correct plugs for you!
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