Naturally aspirated 5.0 from a 97 mountaineer, no EGR, headers so only 2 mods.
Has autolite AP104's in it now, they look like they have been replaced recently.
Is there another plug that you recommend?
Spark plugs
Moderator: MalcolmV8
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Re: Spark plugs
Autolite 768s are the typical copper plug for GT40p equipped Explorers (according to Autozone's website). However if you are looking to go to a slightly cooler plug, that would be an Autolite 103. Although unless you are high compression or boosted, you likely don't need cooler plugs.
I dont know what Autolite 104s are.
I used to use Bosch platinums but I've had 3 of them go bad on me with less than 50k. So I've sworn them off and now just use copper cheapo plugs. The only other plug I've ever had that was bad was a Champion I put in the old v6...and it was bad out of the box...cracked porcelain. My guess is it was probably dropped.
I dont know what Autolite 104s are.
I used to use Bosch platinums but I've had 3 of them go bad on me with less than 50k. So I've sworn them off and now just use copper cheapo plugs. The only other plug I've ever had that was bad was a Champion I put in the old v6...and it was bad out of the box...cracked porcelain. My guess is it was probably dropped.
...Always Somethin'
89 Ranger Supercab, 331, ported GT40p heads w/1.6RRs, Crane Powermax 2020 cam, ported Explorer lower, FMS Explorer (GT40p) headers, aftermarket T5 'Z-Spec', 8.8" rear w/3.27s, Powertrax Locker, A9L w/Moates QuarterHorse, Innovate LC-1, James Duff traction bars, iDelta DC Fan controller
Admin of EECtuning.org
89 Ranger Supercab, 331, ported GT40p heads w/1.6RRs, Crane Powermax 2020 cam, ported Explorer lower, FMS Explorer (GT40p) headers, aftermarket T5 'Z-Spec', 8.8" rear w/3.27s, Powertrax Locker, A9L w/Moates QuarterHorse, Innovate LC-1, James Duff traction bars, iDelta DC Fan controller
Admin of EECtuning.org
- MalcolmV8
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Re: Spark plugs
I always go with copper plugs on projects, hot rods or any sort of toy car. They're cheap to replace and I like pulling plugs to read what the engine's doing when tinkering.
92 302 Ranger - sold
94 302 Ranger AWD - sold
07 BMW 335xi - tuned, boost turned up, E85 - sold
04 911 TT - to many mods to list. Over 600 All Wheel HP on pump gas - sold
2015 Coyote - daily driver
03 Cobra - 2.3 TVS on a built 12:1 CR motor with ported heads, cams, long tubes etc.
MD Racing Lean Protection Module
E85
Tuned by MD Racing
https://www.youtube.com/c/MalcolmV8
94 302 Ranger AWD - sold
07 BMW 335xi - tuned, boost turned up, E85 - sold
04 911 TT - to many mods to list. Over 600 All Wheel HP on pump gas - sold
2015 Coyote - daily driver
03 Cobra - 2.3 TVS on a built 12:1 CR motor with ported heads, cams, long tubes etc.
MD Racing Lean Protection Module
E85
Tuned by MD Racing
https://www.youtube.com/c/MalcolmV8