4.7 Spark Plugs

[07JeepXK]

That seems to be a big gain for just swapping out plugs. I wonder how accurate that is.

[Tymac]

Smoother idle probably comes in the form of a tighter spark gap. Which can be achieved by regapping the stock plugs.

My plugs looked identical to cico7's. Just a little wear on the electrode which opens the gap. My gaps were out 15-20 thousandths.

[Sal-XK]

That seems to be a big gain for just swapping out plugs. I wonder how accurate that is.

I'm not sure how accurate it is just passing on what I have read. If it is true though It would be worth the extra coins they cost. I think there the NGK Iridiums IK plugs not sure I would have to look the thread back up.

[07JeepXK]

I'll have to check them out when I change out my plugs. All I know is im getting rid of the Autolite's.

[jcoulter]

Thread revival!

I got to thinking I need to change plugs again so I looked up what I replaced the OEM's with. Turns out I went with Champion single platinum 3318. I can't find how long these should last. I've put about 45,000 miles since then. I suppose I should pull one and see what they look like.

[Holaday07 4.7]

Thread revival!

I got to thinking I need to change plugs again so I looked up what I replaced the OEM's with. Turns out I went with Champion single platinum 3318. I can't find how long these should last. I've put about 45,000 miles since then. I suppose I should pull one and see what they look like.

I need to do this over Xmas vacation too. What plugs ended up being best for the 4.7?