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Spark Plugs For 4.7

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Old 12-27-2007, 03:21 AM
kvsmith2004 kvsmith2004 is offline
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Default Spark Plugs For 4.7

What is the best spark plug to use for a 2004 4.7 ?
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Old 12-27-2007, 03:43 AM
kvsmith2004 kvsmith2004 is offline
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Default RE: Spark Plugs For 4.7

I am going to put some new plugs in tomorrow and need some advice........
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  #3  
Old 12-27-2007, 08:20 AM
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Default RE: Spark Plugs For 4.7

I'm partial to NGK myself. Won't buy another Champion. Bosch are good, as well.
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Old 12-27-2007, 09:15 AM
rammindodge03 rammindodge03 is offline
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Default RE: Spark Plugs For 4.7

Autolite Platniums are good too.
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Old 12-27-2007, 01:16 PM
wrktruck04 wrktruck04 is offline
 
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Default RE: Spark Plugs For 4.7

im curious to know too as i just got a 04 qc with a 4.7 also and im looking to change em out this weekend.
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Old 12-27-2007, 09:19 PM
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Default RE: Spark Plugs For 4.7

I used NGK V-power in my 02 4.7 and they were great.
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Old 12-27-2007, 09:56 PM
Jr. Mechanic Jr. Mechanic is offline
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Default RE: Spark Plugs For 4.7

NO PLATINUMS! Use the Autolite Copper Core 3923's. They are two heat ranges cooler than the recommended 5224 and are GREAT plugs for how little they cost.
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Old 12-28-2007, 01:04 AM
kvsmith2004 kvsmith2004 is offline
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Default RE: Spark Plugs For 4.7

I went with the stock champs for now they seem to be working just fine.
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Short Bed
Daystar 2.5" Leveling Kit
3.55 Anti-Spin
K&N FIPK Intake
Flowmaster 40 Series Exhaust
Hella 500 Driving Lamp Kit
Rancho RS5000 Shocks
Alpine Head Unit W/Sirius Radio
Infinity Reference Speakers
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Old 12-29-2007, 11:13 AM
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DaHipaKea1313 DaHipaKea1313 is offline
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Default RE: Spark Plugs For 4.7


How many miles on your ride before you decided to changed them out. Are you changing the wires too??

I see Jr Mechanic says "NO PLATINUMS! Use the Autolite Copper Core 3923's. I did read this in another post, just wondering why the cooler plug, isn't a hotter plug more efficient?

Just asking because I don't know
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Old 12-29-2007, 02:06 PM
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Default RE: Spark Plugs For 4.7

Quote:
ORIGINAL: DaHipaKea1313


How many miles on your ride before you decided to changed them out. Are you changing the wires too??

I see Jr Mechanic says "NO PLATINUMS! Use the Autolite Copper Core 3923's. I did read this in another post, just wondering why the cooler plug, isn't a hotter plug more efficient?

Just asking because I don't know
People seem to change them out every 20,000-30,000 with cheap plugs. There are no wires on the 4.7 or 3.7, it is a "coil on plug" design. I just put the 3923's in my 06 Dakota 3.7 with 13,000 miles and it made a HUGE difference. Better idle, better mileage, smoother ride, etc. The reason you dont want platinums is because these engines do not seem to like them along with the 3.9, 5.2, and 5.9 LA series blocks, you will lose 20-50 miles per tank. Not sure about the hemi though. The cooler plugs have a shorter tip and prevent pre detonation. It gives it a smoother idle and better mileage like I said before.
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Old 12-29-2007, 02:06 PM
 
 
 
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39, 47, 47l, 5224, autolite, champion, dakota, dodge, jeep, plugs, ram, spark, v6

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