Ford Ranger Forum - Forums for Ford Ranger enthusiasts!

Go Back   Ford Ranger Forum - Forums for Ford Ranger enthusiasts! > > >
Forgot Password? Join Us!

Welcome to Ford Ranger Forum

Reply
 
Thread Tools Search this Thread

  #1  
Old 10-12-2020, 11:50 AM
jk70 jk70 is offline
Mid-Life Crisis
 
Join Date: Oct 2020
Posts: 7
Default What kind of Spark Plugs to use?

I am sure this has been asked many times yet when I search a get a lot of problems or situations with spark plugs but not the kind to use.

I have a 2003 4WD 4.0 V6. When I input the spark plug part from the manual in Amazon I get mainly an NGK 3951 (TR55) - I assume these are platinum.

In rock auto there are quite a few options including iridium, copper, platinum and double platinum.

So what is the correct part # (AGSF-34P never shows up but cross references to SP440 and others) and the "best" one? Help much appreciated
__________________
2003 FX4 4.0 V6
Reply With Quote
  #2  
Old 10-13-2020, 04:10 PM
JoeMac628 JoeMac628 is offline
Learning to use the forums
 
Join Date: Jul 2016
Posts: 2
Default Re: What kind of Spark Plugs to use?

The original Motorcraft plugs are best, they are double platinum SP440 does cross reference directly to AGSF-34P
Reply With Quote
  #3  
Old 01-22-2021, 05:21 PM
oceanhilltender oceanhilltender is offline
Like the Forums
 
Join Date: Nov 2015
Posts: 42
Default Re: What kind of Spark Plugs to use?

I went with copper...they say it sparks best, just needs to replaced more often
Reply With Quote
  #4  
Old 02-06-2021, 11:03 PM
12 Deg North Industries 12 Deg North Industries is offline
Vehicle Upfitters
 
Join Date: Jan 2018
Posts: 325
Default Re: What kind of Spark Plugs to use?

Quote:
Originally Posted by jk70 View Post
I am sure this has been asked many times yet when I search a get a lot of problems or situations with spark plugs but not the kind to use.

I have a 2003 4WD 4.0 V6. When I input the spark plug part from the manual in Amazon I get mainly an NGK 3951 (TR55) - I assume these are platinum.

In rock auto there are quite a few options including iridium, copper, platinum and double platinum.

So what is the correct part # (AGSF-34P never shows up but cross references to SP440 and others) and the "best" one? Help much appreciated


It depends on how you drive and where. If you're a low risk taker and you just want to play it safe the OE plugs from Motorcraft will be best suited for you. If you're a person who takes their vehicle or driving a bit more serious than NGK would be our suggestion.

Been running them in everything and anything since the mid 80's, same with their wires, won't run anything else. BTW the difference in a NGK Plug vs a Ferrari OE plug is the additional $20 they charge for the Ferrari Monogrammed box - Same plug, same part number, Same plug physically, same performance with $20 more box.

Call a Ferrari dealer and get a part number, cross reference it.


If you're looking for an upgrade to the Motorcraft -

NGK p/n 2683 - TR55-1 0.054" gap x6 OE Equivalent
NGK p/n 7159 - TR55-1GP 0.054" gap x6
NGK p/n 7316 - TR55-1IX 0.054" gap x6


https://ngksparkplugs.com/en/part-finder


- Spark plug gaps I would leave the OE spec'd.

- If you're in a usually warmer climate, you may want to consider going down a heat range. You'll run a bit better and cooler. If you're in a 4 season climate just stick to the numbers of your choice above.

To check on a heat range specifically, Contact is here. they are EST

NGK -- 1-877-473-6767
Dial #1 (Application Support)
Dial #2 (Advanced Tech Support)
hours: 9:00am -5:00pm
Monday-Friday EDT

- Can't justify the iridium plugs for your application but the V or G will do you fine. You'll notice more at idle and at top of the speedometer end.


We specifically run G-plugs - "1 heat-range cooler", in both our '94 & '93 rigs along with the NGK wire set on those OHV 4.0L, never have an issue and we're in sometimes 112*-117* ambient desert temps here, in Las Vegas, Nevada + the 4.0L runs hot as it is, and then normal under hood temps.

360K+ miles on one 183K on the other original engine.

Hope that helps.



.
__________________
12 North Industries
Las Vegas, Nevada 89118
Web www.12degnorth.com
Reply With Quote
  #5  
Old 02-08-2021, 04:00 PM
dvrich dvrich is offline
Ford Ranger Driver
 
Join Date: Sep 2010
Posts: 3,167
Default Re: What kind of Spark Plugs to use?

Quote:
Originally Posted by oceanhilltender View Post
I went with copper...they say it sparks best, just needs to replaced more often

Copper plugs don't spark any better and they do need to be replaced more. Don't take advice from "they" anymore.
__________________
Reply With Quote
  #6  
Old 02-10-2021, 02:13 PM
12 Deg North Industries 12 Deg North Industries is offline
Vehicle Upfitters
 
Join Date: Jan 2018
Posts: 325
Default Re: What kind of Spark Plugs to use?

Quote:
Originally Posted by dvrich View Post
Copper plugs don't spark any better and they do need to be replaced more. Don't take advice from "they" anymore.

One day, we will see a Youtube'r take all of the best one-liners and zingers of yours and create a montage like the Al Bundy from Married with Children TV programs and make it into a video.


* I will have to subscribe
__________________
12 North Industries
Las Vegas, Nevada 89118
Web www.12degnorth.com
Reply With Quote
  #7  
Old 03-08-2022, 09:54 AM
RussAdams RussAdams is offline
Learning to use the forums
 
Join Date: Apr 2021
Posts: 6
Default Re: What kind of Spark Plugs to use?

Quote:
Originally Posted by 12 Deg North Industries View Post
.

Thanks for the detailed reply! I'm picking up NGK plugs and wires based on your reply.

Last edited by RussAdams; 03-08-2022 at 09:58 AM. Reason: Wanted to mention 12 Deg North in the Thank you.
Reply With Quote
  #8  
Old 03-15-2022, 10:15 PM
12 Deg North Industries 12 Deg North Industries is offline
Vehicle Upfitters
 
Join Date: Jan 2018
Posts: 325
Default Re: What kind of Spark Plugs to use?

Quote:
Originally Posted by RussAdams View Post
Thanks for the detailed reply! I'm picking up NGK plugs and wires based on your reply.

Good to hear, been using them for years.. No regrets

Can you grab us a couple Green Tea's on the way back too?
__________________
12 North Industries
Las Vegas, Nevada 89118
Web www.12degnorth.com
Reply With Quote
Reply

Thread Tools Search this Thread
Search this Thread:

Advanced Search


Similar Threads
Thread Thread Starter Forum Replies Last Post
Wtf kind of spark plug is this.. dangerranger94 Off Topic 10 05-20-2014 09:14 PM
For Sale: SOCAL - Dynomax Exhaust, K&N Intake, NGK Spark Plug Wires, Iridium Spark Plugs givemeporknow Engine & Drivetrain Parts 0 01-01-2013 12:29 AM
spark plugs 97 2.3 2wd ranger. change driver side plugs or passenger dontaylor General Tech 7 08-06-2012 08:18 PM
Spark plugs. penguin 4.0 SOHC / 4.0 OHV Tech 8 03-22-2011 12:51 PM
not sure what kind of plugs to run?? hpfreak08 3.0 Vulcan Tech 14 11-24-2009 08:28 AM