Ok well I am out changing the plugs right now with the autolite 3293's, but I have a couple of questions. When I was at walmart, I looked up which plug to use just for ****s and giggles, and, it came up in the book as 5224 (something like that, I think thats it) for the 3.7 AND the 4.7, 3293 was not mentioned at all. I got the 3293's because of everyone that has tried them here. Now, why am I pulling out NGK "R"s??? I thought the stock plugs were ****ty champions?? Can someone explain this??

 

did you buy it new or used? and aren't NGK's Platinum? IDK dude i have no clue..mine where champions never heard of the NGK's in our trucks...all the trucks i've ever seen come through here have Champions or Autolites!

 

I have ngk v-powers in mine now but stock they where champion

 

i was told by dodge that the autolite arent good that it messes wit the computer or something//

 

Truck is brand new, we got it with 12 miles on it. The plugs were not gapped consistantly, and were definitly NGK R's. However I do think it is running better with the autolites. I did also have a MIL light on when I started it so I put my scanner on it and came up with the IAC sensor input voltage too high. I cleared the code and it was fine, so I dunno lol. Now i have another problem[:@]

 

Well all is good now, she is definitely idling better and starts easier. One thing I also noticed is that while it is in park, before I could only rev it to 3300 until the rev limiter kicked in, and now I can rev it up to 4000. Strange...

 

There's been a zillion threads about the 3923's lately, gonna re-post this again...

The standard plug for the 3.9L V6, 4.7L V8, 5.2L V8, 5.9L V8, etc. is the 5224. A lot of people have switched to the 3923 which is a little bit shorter than the 5224 plug, and one heat range colder. The Magnum V6/V8 tends to detonate when hot or under heavy load - the reason people started switching to the 3923 wasto give a more controlled burn by preventing early detonation. Cooler plugs do NOT make more power! If you're feeling "more power" from a 3923, it's because your prevous plugswere probablyFUBAR, or your engine was experiencing a lot of detonation issues (you should also look into replacing your cap/rotor, spark plug wires, use higher octane fuel, etc.). The main benefit of a colder plug is a controlled burn (this is the same reason to use higher octane fuel, which also contrrary to popular belief is HARDER to burn).

Standard plug length: 5224
One heat range colder: 5223
Two heat ranges colder: 5222

Shorter length: 3924
One heat range colder: 3923
Two heat ranges colder: 3922

 

maybe dodge finally realized that the champions were not doing the job and switched to the ngk.or someone at the dealer swapped them out. but being they were not gapped consitantly seems they came from the factory. you will like the 3923. they are a good plug

 

Ya, I got Autolites on my truck, my Celica, and on my friends GMC Sierra. :-)

I really like them, as does he.

 

HAHA...you know the only reason "stealrships" as someone told me one time on here don't remember who though, tell you that they are not good for your truck? cause compared to 10.25 at walmart for 8 plugs...the champions cost like 22 bucks...and the labor instal of 1.5 hours...so bout roughly 179 dollars, compared to 10.25 and you put them in yourself!! so yeah