autolite plugs?
autolite plugs?
Are those good? I need to get rid of my bosch's...Any particular kind I should get? I would get motorcraft but no one sells them besides ford and I dont want to buy them online
double platinum 100% prefered. Im running them as well. and when my new coil pack gets in, i will be putting new ones in. Tho i do have a 4.0. either way no difference. Gatorblue is right Autolite=Motorcraft
Originally Posted by 4x4offroad99
If your gonna get Autolites, get the XP series Iridium. Part # for your '02 3.0L is XP104. Bout $4-6 depending on where u shop.
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.
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.
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.
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.
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.
Never changed the plug wires and when you say another possibility is theyre crossed? Does that mean I plugged them into the wrong one? If so we can eliminate that because I marked them to make sure I plugged them in the same one.
Did you check the gap on the plugs before installing them? It could be that the wires may have gotten damaged when you pulled them off the plugs you replaced. Be sure to listen and feel for a "snap" when you put the wires back on the plugs.
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nross
4.0L OHV & SOHC V6 Tech
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Jan 17, 2010 05:10 PM








