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Discussion Starter · #1 ·
Anyone know it? Looked everywhere, cant find it...Gotta change the upper bank plugs before a 1200 mile road trip when I get home in a few days. They got 62k on them...that means they are...32k overdue.:doh: The wife reports the truck is stalling out every once in a while and I think this might be the culprit.
 

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Discussion Starter · #3 ·
No it isnt in the manual, I have looked, and looked and looked, and looked again...as well as googled my ass off. I cant find it anywhere. Dont do the iridiums, the way the engine runs, it will foul them out in 30k as well. Everything I have read points to it being a waste of money. Just go with NGK, or Bosch Copper plugs and save yourself the $50-$75.

Bosch are like $3.25 a piece. NGK Iridiums are $12.99.
 

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Discussion Starter · #4 ·
AH-HA! It is in the manual...it eluded me...:doh:

Spark Plugs – 4.7L Engine Upper Bank — FR8TE2 (Gap 0.039 in [.99 mm]) Lower Bank — FR8T1332
(Gap 0.051 in [1.30 mm])
 

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Discussion Starter · #6 ·
It has to do with the way the truck burns the fuel, and the temperatures in the combustion chamber. Its hard to explain. It does not really make sense to me either, but the Lead Tech at my dealership even told me, go with the cheaper plug because they all foul out no matter what. When my wife called him to get a quote on the plugs, she told him what it was doing, and he said "its common for the 4th gen's to stall out when they need plugs. Sometimes they wont ever throw a code."

So, there you have it 4th gen owners. Change your plugs on schedule. :LOL:
 

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Discussion Starter · #8 ·
No, the lower banks have platinums in there, and thats what I will use when I do those at 100k.
 

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Discussion Starter · #10 ·
They may be, for sure they are either platinum or iridium, and thats what will go in there when I replace them, but the top row does not seem to benefit from them.
 
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