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Baller04
Dodge Dakota
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3/07/2006
12:49:01
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 Subject: Autolite Plugs
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Message:
It is about time for a tune up for my 2003 SXT and I was wondering about what plugs to run. I see alot of old posts about running Autolite 3923 plugs. However, I can not find them on Advance Auto's website. They have the Autolite 5224, is this an equivalent plug? And what does everyone think about NGK plugs? Thanks for your time.
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screwuphead
Dodge Dakota
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3/07/2006
13:00:58
|  RE: Autolite Plugs
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try looking for them on summit, thats where i found mine.
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Joe M.
Dodge Dakota
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3/07/2006
13:08:48
|  RE: Autolite Plugs
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Message:
NGK's are great plugs, (only plugs i use)
someone posted the part# on here
for 1 range colder,
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Baller04
Dodge Dakota
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3/07/2006
13:11:23
| RE: Autolite Plugs
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Thanks for the info. guys.
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J and J Auto
GenII
3/07/2006
18:24:18
| RE: Autolite Plugs
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Message:
5224 is the stock heat range extended like stock
champ
3923 1 range colder
The NGK FR4 stock
the NGK FR5 1 colder
The autolite or the NGK FR V power plugs run very
well in these motors try the 1 range colder most
trucks react very well to the 1 range colder
I am running a set of FR5 in my Dak and they
run almost as well as the halo's but are a lot
cheaper $2.25 vs $7.99 each
Try the NGK the resistor type over the autolite
seam to have better talk back to the comp and
better throttle response
The reg NGK were the same as the autolite but the
V do run better
Larry
J&J Auto
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Baller04
Dodge Dakota
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3/07/2006
20:03:57
| RE: Autolite Plugs
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Message:
Larry thanks for the information. Very valuable as all your posts seem to be.
I just have a couple more questions about the NGK for anyone that wants to chime in. When I go to there website they are telling me that the stock plugs for my 2003 are ZFR6F-11 and that if I want a range colder then I would have to go to the 7F. Is the information on their website incorrect? Also, should I still get a range colder if all the mods that I have are a CAI, a flowmaster 40 muffler, MSD wires, and a brass cap and rotor?
Thanks for everyone's time.
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Gen I
Dodge Dakota
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3/07/2006
20:16:42
| RE: Autolite Plugs
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Message:
Also, could someone mention if the '1 degree range colder' spark plugs would work for a Gen I engine, please? {I assume they are different engines? ie..Gen I,II,III}
PS No codes and still pings a little on 89 Dakota V6.
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Joe M.
Dodge Dakota
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3/07/2006
21:25:35
|  RE: Autolite Plugs
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Message:
Gen1 the 1 range colder plugs are to help
with the pinging issue.
no garuntee it will get rid of it all together
but cant hurt to try,
180 Tstat will also help but does trip codes in some (it does in mine)
not to familiar with the gen1's
do you have an EGR valve? if so has it been replaced? they will cause a bad pinging prob. when they go .......
& thanks Larry!
once again to the rescue! LOL
anyway and i should have said the V-power
i've been runng the plugs for years
& they are quality. i had some issue with my harley fouling plugs i tried split fires
that was a waste, went to the NGK VX's
and no prob since, nice crisp response too
both trucks and the buick NGK Vpower
and NGK marine plugs in the johnson outboard
(V4 seahorse)
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01_Dak
Dodge Dakota
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3/08/2006
01:03:05
| RE: Autolite Plugs
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Message:
I got my platnum 3923's at WalMart about a month ago. They were sold in packs of two. Is there any real difference in the platnums? I only went with the platnums because they didn't have all 6 of the regular ones.
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J and J Auto
GenII
3/08/2006
09:52:26
| RE: Autolite Plugs
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Message:
The plat tip autolite has a lower resistance to
fireing gap .005 bigger
The FR5 NGK is a direcct cross referance for the
autolite 3923
If you go to NGK.com it will list the FR4GP which
is also a plat plug just take the GP of and you
have the std plug FR4
NGK #'s are reversed the higher the # the colder
FR4 3924, 5224 or champ RN12YC RN12LC4 extended
FR5 3923, champ does not have 1 range cooler
but they have a 10 which is 2 ranges
The combustion chamber runs best between
500 to 800 degrees centigrade
1 heat range will lower the temp aprox 100 degrees
As I said most trucks react very well to 1 range
colder
Try the FR5 NGK we just started to use them over
the expensive halo and are getting some very
good resaults with them
They come gaped at .039 so If your truck calls for
.035 you need to change the gap if .040 just
check them and put them in
Always check the gap on new plugs
Larry
J&J Auto
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Baller04
Dodge Dakota
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3/08/2006
19:17:19
| RE: Autolite Plugs
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Message:
Larry thanks again for all you information it is really appreciated. But I still do not know which plugs to run. I went NGK website and search for my truck (2003 3.9)and it says the plug for my truck is ZFR6F-11. Then I search for what I believe is your truck (1995 3.9) and the plug for yours is exactly as you say the FR4 or FR4GP. So you are saying that you are running the FR5 (1 range colder) and suggest that I run 1 range colder which would be the ZFR7F-11. If I was to run the FR5 that would actually be 1 range hotter, correct? Please shed some light on this for me. Thank.
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Gen I
Dodge Dakota
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3/08/2006
19:57:47
| RE: Autolite Plugs
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Message:
Joe M., thanks for the info. Did replace and work on a few things on the EGR system. Helped quite a bit. Though, still pings just under 2000 RPMs and under a little load. Weird.
Further, I think I'll just have to figure out how to find the colder range spark plugs for myself. The only things I can think of right now are gap for one, and then the distance of of spark plug metal that enters the chamber. I guess this brings up the curiousity of 'how the hell did someone figure out that these engines work *better* at a lower combustion temperature.?' Thats either takes some simply guess and check ( balls ) or thinks he knows what he's doing. ;-O And further, that a 'different' plug would simply work? :- |
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OBIO3
Dodge Dakota
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3/08/2006
21:46:24
| RE: Autolite Plugs
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Message:
Larry...... With all due respect, I have to disagree with one point you just made here. Your stating droppng heat range lowers chamber temp about 100 degrees. All my intelagance combined with 40 plus years of experimenting on my own in my shop, spark plug heat range has absolutely no effect on chamber temp. Heat range only dictates how well the plug transfers obsorbed heat to the head and on to the cooling chambers. only the extended tip of the plug is in the cylender. The faster the engine runs, the more air/fuel there is entering the chamber passing over this extended tip. this is the intended design of the plug so it cools down better the faster you go there by making it act as a colder plug. In slow city driving your engine requires a hotter plug. this is to burn off carbin created at these speeds. So now the extended plug is acting as a hotter plug. any none believers need only put a set of plugs in say 3 numbers colder. the carbin well just keep building up on the plugs and in time plug the electrodes. Driving these plugs on the highway well not clean them as they run cooler yet. Now If you said a 180 thermostat lowered combustion chamber by about 100 degrees I would be more likely to believe that posibility. New subject..... You never mentioned using champion plugs. My information tells me(and correct me if i'm wrong)the champion plugs have the highest resistance built in. 75,000 ohms for regular resistor plugs. This is a PLUS for the dodge pingers.75,000 OHMs slows spark accurance down how ever so slightly but none the less it does slow it down. In my book this is exactly what we all need. In my case I run nothing but champion truck plugs. There long life plugs, my engine runs really great and best of all these truck plugs have 85,000 OHMs resistance. I also open my gap 10 thousands giving more resistance yet. Not including all these pluses as I see it anyway, All this resistance plus the extra 10 thousands holds arc over accurance long enough to create by far the very best hottest spark which again we all need. I would be very interested in any opinions that punch holes in what I have said. Every thing here has been proven over and over by me. not just someting I read. My opinions for what there worth and not intended to descredit anybody in any way.
So many problems .... So little time
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J and J Auto
GenII
3/09/2006
16:43:06
| RE: Autolite Plugs
IP: Logged
Message:
Yes a colder plug will transfer more heat thus
running colder with less chance of ping
NGK is oposite of most other plugs the higher the
number the colder the plug
stock
Autolite 5224, 3924, champ RN12YC RN12LC4 FR4
1 colder
Autolite 3923 FR5
Yes the ZFR7F-11 would be 1 range colder
I have run 2 ranges colder and they will not foul
in these computer controled engines like they
would in the old carbed motors
Larry
J&J Auto
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Baller04B
Dodge Dakota
JOIN HERE
3/09/2006
19:39:46
| RE: Autolite Plugs
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Message:
Thanks for everyone information.
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OBIO3
Dodge Dakota
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3/09/2006
19:44:09
| RE: Autolite Plugs
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Message:
Larry. Again with all due respect. I agree with 2 numbers cooler but it is marginal. I stated 3 numbers colder and they will foul slowly with no ability to clean themselfs. I'm not understanding the computers ability to stop fouling on improper plugs . It can not change plugs heat range nor can it change chamber temp. It does adjust timing and fuel delivery but this is determined by engine temp.(thermostat)and how itis being driven without getting into all the sensers. All that isn't covered is spark intencity and that is constat as a;;owed buy the coil only dependant on resistance and gap. I'm always open to learning
So many problems .... So little time
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Joe M.
Dodge Dakota
JOIN HERE
3/09/2006
21:30:36
| RE: Autolite Plugs
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Message:
wow i can see this subject is going to get beat ta death,
personaly i dont care how, but i do know they "do" work (1 range colder)
and thats enough to satisfy me
hey Gen1 glad i was of some help bro
forgot to mention when mine let go
i did alot of reading on the EGR
found they can cause = stalling issue's,
pinging (and most times the egr over looked as the cause) poor MPG's and generaly a poor running motor
when they go bad they let exhaust gas into the intake, hench where the pinging comes in.
they generaly dont last for more then 50 thou.
but on the good side if you replaced yours
your good for quite awhile.... best to ya
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J and J Auto
GenII
3/10/2006
00:47:55
| RE: Autolite Plugs
IP: Logged
Message:
The EGR can cause bad mileage and performance and
needs to be checked out
Flow test while idling run a vac hose from the
valve that is bolted on the intake manifold
if you don't have a vac pump just use the poormans
and suck on it it shold stumble the engine or
even kill it
The line that cmes over from the purge valve put
a vac guage on it the vac should rise slowly when
reved and around 2000rpm be same as motor vac
18 t0 20 psi this will tell you if the purge
vac switch is ok
A leaky egr will cause rough idle and the only
way to check tis is to unbolt the valve 2 10mm
bolts and blow on it with your mouth to see if
its leaking
If so replace it and replace both transducer and
valve they come as calibrated units
Larry
J&J Auto
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