autolite plugs?
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Originally Posted by 4x4offroad99
From what I have learned iridium is a harder metal and hotter burning. The hotter the spark the more fuel/air is being burned, thus more power. I installed them in my 99 4.0, really couldnt tell a difference till I took one out at bout 75k miles, the electrode still looked brand new.
I agree, stay with the double platinums, or the new Motorcraft "fine wire" platinums that run well.
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Remember split-fire spark plugs? Now those were plugs that burned so hot that they caused pre-ignition, or burned a hole in the top of the piston. These XP's wont, Autolite did their homework on these plugs. Thats why they have specific part #'s for applications. They been burning in mine for over 4 years now, over 120k on them with no problems whatsoever.
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Originally Posted by rondog
so I installed them today..what would cause my truck to acellerate rough before 2rpms? Wrong gap? Not screwed in tight enough? I had trouble screwing them in since their isnt a whole lot of room, but I noticed when I accellerate, its kinda jumpy or rough at the very low end of my mph.
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nross
4.0L OHV & SOHC V6 Tech
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01-17-2010 05:10 PM