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Dakotaman
Dodge Dakota
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10/17/2002
14:27:42

Subject: Spark Plugs 3923's
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I have a stock 98 3.9 dak. I was wondering if autolites 3923 would be good for my engine or should I go with splitfires or something. What does the colder plug do over the suggested stock ones? My engine burns a bit rich, will the autolites 3923 cause any harm?



macman37
Dodge Dakota
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10/17/2002
14:44:24

RE: Spark Plugs 3923's
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I just put them in my '02 dak. They rock and I would highly recommend them. The engine idles much more smoothly.

As for what a colder plug does, do a search on the plugs. These plugs have been debated quite a lot. All I can say is that since I installed them last Saturday, the engine runs great. ; ) I would say do it. They're not expensive. When these need replacing the only thing I'll change is perhaps going to Platinum plugs for more longevity.

jim



Pistolero
Dodge Dakota
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10/17/2002
20:22:18

RE: Spark Plugs 3923's
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I get the idea that the 3923's don't always work the same in every truck. Dakota Dan has a 2001 V6, and he said that they caused a bog in his off line acceleration, so he put the original plugs back in, and they cured the problem. My truck's an '02 V6, and I've hesitated to install them for just that reason. While I was doing my header install the other night, I pulled the plugs to look at them, and they were bright white, which tells me that they're running a bit hot. I'm going to try some NGK ZFR6F11 V groove plugs, which are in the same heat range as the 3923's. See what happens...

According to the NGK website, a hotter plug does not dissipate heat or remove heat from the combustion chamber as fast as a colder plug. A hotter plug will have a longer insulator tip than a colder plug.



dakotaman
Dodge Dakota
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10/18/2002
10:25:10

RE: Spark Plugs 3923's
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Will the 3923s improve mpg? Has anybody tried the NGK V-grove plugs? Are they any better and would they improve mpg? Appreciate if anybody could give your comments!



Andy
Dodge Dakota
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10/18/2002
18:08:47

RE: Spark Plugs 3923's
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Pistolero: If your plugs look white, your engine is running too lean... what other mods have you done?



Pistolero
Dodge Dakota
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10/19/2002
00:56:59

RE: Spark Plugs 3923's
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Andy, I hadn't done any engine mods prior to pulling the plugs and looking at them. I think that it's probably mostly because the truck is still new (only 2000 miles), and the plugs haven't had much time to discolor yet, but I thought that they might have a hint of a brown color to them if they were the proper heat range. I don't have any stumble or hesitation off idle, so I'm assuming that the air/fuel mix is OK. I bought the NGK ZFR6F11 V groove plugs to try out...so I'll see what they do after I get a few more miles and a few mods on it.



Andy
Dodge Dakota
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10/19/2002
09:25:20

RE: Spark Plugs 3923's
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Pistolero, I think you are right, the plugs should have some brownish color... But if the truck is new and you haven't done any mods yet, I don't have any good idea... I hope the NGKs help.



NOSDART68
Dodge Dakota
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10/19/2002
15:54:02

RE: Spark Plugs 3923's
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All I know is that the 3923's made it run much smooter compared to stock. Well worth $7.



Eggman
Dodge Dakota
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11/02/2002
15:37:35

RE: Spark Plugs 3923's
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Has anyone besides me tried the bosch platinum plus 4 plugs? Iinstalled a set and got better gas milage.



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