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Old 10-04-2012, 11:17 PM   #1
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Default spark plugs for 4.6 v8?

im getting the intermittent rough idle in my 04 f150 4.6 v8 im thinking its time to change the plugs.. agree? anyways what are the plugs I should go with? price if you know would be great...thanks!
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Old 10-04-2012, 11:19 PM   #2
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forgot to mention...little over 94,000 miles
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Old 10-04-2012, 11:25 PM   #3
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I just put ngk tr55 and mine idles nice and smooth now... Yes they are copper cores but my 02 gt loved the tr6's so i may have to replace them a lil more but i dont copper cores are in a sense... A better plug
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Old 10-04-2012, 11:29 PM   #4
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I just put ngk tr55 and mine idles nice and smooth now... Yes they are copper cores but my 02 gt loved the tr6's so i may have to replace them a lil more but i dont copper cores are in a sense... A better plug
did you get new wires too or use old ones? if so how much did all cost?
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Old 10-04-2012, 11:40 PM   #5
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There is no wires on the 99+ modulars just a boot and spring but no i did not replace them and i dont remember i wanna say 18
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Old 10-04-2012, 11:49 PM   #6
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I was wondering the same thing. My trucks got a bit of a ruff vibration when idling.. Just bought the truck so it wouldn't suprise me to need a good tune-up haha. Good plugs/wires to use... and where to buy/price? Mines also a 2004 XLT 4.6L V8, with 137k miles.
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Old 10-04-2012, 11:52 PM   #7
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Are you saying we dont have plug wires to replace on these trucks :o? I had them on my 1997 and my dad has them on his 2000 :z
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Old 10-04-2012, 11:52 PM   #8
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I was wondering the same thing. My trucks got a bit of a ruff vibration when idling.. Just bought the truck so it wouldn't suprise me to need a good tune-up haha. Good plugs/wires to use... and where to buy/price? Mines also a 2004 XLT 4.6L V8, with 137k miles.
stated above...these trucks dont have wires..assuming just use what you have as the boot and spring...just buy plugs...roughly 25 bucks on the high side for all 8 plugs....but you may need to buy new boots when changing them due to them ripping apart...some do and some dont..some people are lucky without replacing the boot and some have bad luck and they rip. haha
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Old 10-04-2012, 11:57 PM   #9
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Ah, cool. In that case looks like this weekend or next... spark plug change , Glad I stumbled across this tonight. I was thinking I'd have to save up for a few weeks minimum to save up enough for plugs+ wires haha :P. Awesome!!! But I would prob. want to upgrade my boots at one point or another to get better quality ones under the hood.
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Old 10-05-2012, 12:00 AM   #10
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Ah, cool. In that case looks like this weekend or next... spark plug change , Glad I stumbled across this tonight. I was thinking I'd have to save up for a few weeks minimum to save up enough for plugs+ wires haha :P. Awesome!!! But I would prob. want to upgrade my boots at one point or another to get better quality ones under the hood.
boots would roughly be between 35 and 45 bucks. and plugs 25 bucks. but all worth it to have a smooth running truck
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