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Old 08-07-2012, 03:41 AM   #1
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Time for new Spark Plugs

I noticed a slight drop in mpg recently and realized its been awhile since I changed the plugs out. Might as well since they're cheap. That's where you guys come in.

I've heard champion truck plugs and autolite are great plugs. Can someone throw me up the part number to either one, or name the better plug?

Thanks, Nick.

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Old 08-07-2012, 08:43 AM   #2
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Quote:
Originally Posted by Derp View Post
I noticed a slight drop in mpg recently and realized its been awhile since I changed the plugs out. Might as well since they're cheap. That's where you guys come in.

I've heard champion truck plugs and autolite are great plugs. Can someone throw me up the part number to either one, or name the better plug?

Thanks, Nick.
I changed mine this weekend, used Autolite platinum. Looking thru the threads, it seems most people go with the double-platinums (although my Autozone was out at the time). The doubles say they will last 100k mi, but its a cheap, easy maintenance item and I'd still replace every 30k or 40k mi at least. Additionally, the gap was .035 (I've got an '06, 4.0L). The Autozone guy should be able to bring up exactly which plug is for your vehicle and the gap distance. On a side note, NGK where in my Jeep (prob by the PO) and two broke when I pulled them out, I'd stay away from that brand.

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Old 08-07-2012, 09:38 AM   #3
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Quote:
Originally Posted by Derp View Post
I noticed a slight drop in mpg recently and realized its been awhile since I changed the plugs out. Might as well since they're cheap. That's where you guys come in.

I've heard champion truck plugs and autolite are great plugs. Can someone throw me up the part number to either one, or name the better plug?

Thanks, Nick.
Recommending the right plugs for you depends on what engine and model year you have... i.e. distributor equipped vs. distributorless.
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Old 08-07-2012, 09:40 AM   #4
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It's an 04 4.0 so distributor
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Old 08-07-2012, 09:44 AM   #5
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I run Champion 7034 in my 01 4.0. Best I've found.
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Old 08-07-2012, 10:23 AM   #6
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I agree I have a 98 and I run the standard champion copper plugs and I haven't had any problems.
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Old 08-07-2012, 10:26 AM   #7
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7034's are double platinum.
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Old 08-07-2012, 10:28 AM   #8
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It's an 04 4.0 so distributor
04's dont have distributors :s
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Old 08-07-2012, 10:31 AM   #9
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Changed my plugs a week ago.

Autolite XP plugs. Advance Auto Parts put in an overnight order for me bc they don't carry them and picked up them up the next morning.

They say pregapped but all plugs were not they had smaller gaps as the engine light came on after I installed them. So I had to pull each one and regap and now my Jeep runs fine. Oil change and had fuel system cleaned afterwards and now my Jeep runs smoother and quieter when in idle.

I learned my lesson so what ever plugs you get make sure you check each gap or you will do twice the work lol
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Old 08-07-2012, 10:55 AM   #10
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Quote:
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04's dont have distributors :s
O.o they don't? I havent looked under the hood and thought about it. I figured they would have been. Thanks for the correction I guess you learn something new everyday.
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Old 08-07-2012, 11:14 AM   #11
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Are you doing the work Derp?
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Old 08-07-2012, 11:50 AM   #12
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Are you doing the work Derp?
Yep I will be. I figure I can handle some plugs >:}
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Old 08-07-2012, 01:18 PM   #13
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It's an 04 4.0...
Three very good plugs for your distributorless 4.0L include the platinum Autolite APP985 or Champion 7034, or the iridium Autolite XP985.
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Old 08-07-2012, 01:22 PM   #14
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Not to steal the post.. but i kinda am, whats some good plugs for my 97 4.0?
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Old 08-07-2012, 01:23 PM   #15
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Three very good plugs for your distributorless 4.0L include the platinum Autolite APP985 or Champion 7034, or the iridium Autolite XP985.
Which particular plug would you get jerry?
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Old 08-07-2012, 01:36 PM   #16
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Autolite XP985 iridium which is probably the last plug it will need. A friend at Autolite looked at his iridium plugs under the company microscope at 165k miles and could detect no visible wear.
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Old 08-07-2012, 01:40 PM   #17
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Autolite XP985 iridium which is probably the last plug it will need. A friend at Autolite looked at his iridium plugs under the company microscope at 165k miles and could detect no visible wear.
Holy hockey sticks 0.0

Where can I get those?
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Old 08-07-2012, 01:43 PM   #18
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Any auto parts store has or can order them for you.
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Old 08-07-2012, 02:33 PM   #19
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Any auto parts store has or can order them for you.
Thanks jerry. You're the man!
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Old 08-07-2012, 03:40 PM   #20
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Autozone has a $10 mail in rebate on the Autolite XP95 with the purchase of at least 4 plugs. Download printable mail-in rebate form.
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Old 08-08-2012, 12:53 AM   #21
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Got my plugs with rebate, thanks everyone

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