Spark Plugs
Changing the sparg plugs on these are just like any other vehicle. And unlike the Hemi there are only 8 of them. Just make sure you use copper core plugs and not titanium or irriduim. They need to be changed every 30,000 miles.
You can download your manuels here...
http://www.dodge.com/en/owners/manuals/index.html
You can download your manuels here...
http://www.dodge.com/en/owners/manuals/index.html
Stautz:
The 4.7 engine uses coil on plug ignition. There are eight plugs each with a coil on top of it that sit on the top of the intake manifold.
There is a 10mm nut on each coil that you remove, then disconnect the harness connector by pinching it. Then gently pull/lift the coil straight up and out.
Remove the plug, and reinstall the new one. The factory plugs are only rated for 30k. I recommend the Champion RC12PYP. It is double platinum, and will last two or three times as long as the oem units
Some folks will cry that the 4.7 motor does not do well with platinum plugs, but I have a set in mine with almost 40k on them, and the gap is still .040.
It runs as good as it ever did. Don
The 4.7 engine uses coil on plug ignition. There are eight plugs each with a coil on top of it that sit on the top of the intake manifold.
There is a 10mm nut on each coil that you remove, then disconnect the harness connector by pinching it. Then gently pull/lift the coil straight up and out.
Remove the plug, and reinstall the new one. The factory plugs are only rated for 30k. I recommend the Champion RC12PYP. It is double platinum, and will last two or three times as long as the oem units
Some folks will cry that the 4.7 motor does not do well with platinum plugs, but I have a set in mine with almost 40k on them, and the gap is still .040.
It runs as good as it ever did. Don
Wishbone:
That is interesting information. Now, my D is a first generation, but I have not seen that explanation given anywhere in the owners manual.
At one point, the dealer did comment about my plugs, but never said anything about running hot, or voiding the warranty.
I do know through my fleet connections though that replacing the copper plugs when they wear out with platinums is a recommended alternative. Especially on the Hemi with its 16 plugs.
IMO, that information is BS.
I think it is quite ridiculous in this day and age for a vehicle to have plugs that only last for 30k. Ford and GM have had 100k plugs on the market for 15 years.
Personally, I think Chrysler likes to sell plugs.
Don
That is interesting information. Now, my D is a first generation, but I have not seen that explanation given anywhere in the owners manual.
At one point, the dealer did comment about my plugs, but never said anything about running hot, or voiding the warranty.
I do know through my fleet connections though that replacing the copper plugs when they wear out with platinums is a recommended alternative. Especially on the Hemi with its 16 plugs.
IMO, that information is BS.
I think it is quite ridiculous in this day and age for a vehicle to have plugs that only last for 30k. Ford and GM have had 100k plugs on the market for 15 years.
Personally, I think Chrysler likes to sell plugs.
Don
At only $1.80 each I don't think they just like selling plugs.
The thing is they do good. Have you ever drove a Ford or Chev for 100K and then change the plugs or even look at them! Talk about holy ****! You put in new plugs and you have a new truck almost. I call Bull ****!
I have always replaced my plugs at least once per year and the vehical's run great not to mention you break it down and the motors are burning clean. You rip one down that used the same plugs for 100k or even 50k and compair the two and you WILL change them out too!
The thing is they do good. Have you ever drove a Ford or Chev for 100K and then change the plugs or even look at them! Talk about holy ****! You put in new plugs and you have a new truck almost. I call Bull ****!
I have always replaced my plugs at least once per year and the vehical's run great not to mention you break it down and the motors are burning clean. You rip one down that used the same plugs for 100k or even 50k and compair the two and you WILL change them out too!
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the 4.7 really likes the autolite 3923 plug. all 8 will cost you under 15.00 at your local walmart. these plugs are one step cooler than the stock champions and will take care of that annoying stumble you sometimes feel at a stop sign or traffic light. i run them in my 05 4.7 dakota with a 125 shot of nitrous without a problem, but yes. change them out every 30000 miles. i had the plats for about 3 months and got rid of them, truck ran bad and i lost almost 75 miles to a tank of gas.
The Autolite 3923 plug is colder so here’s are my 2 cent’s:
With installation of the colder plug it actually retards the timing but against the computer. This increases the ware of the motor because it burns the fuel/air mixture at a slower rate creating increased soot. But the PCM thinks it is burning on time which it's not! This is a BIG problem because this detonation at a retarded timing allows the motor to fully detonate after TDC creating decreased power. This is why the motor creates more soot. A motor creating soot becomes short lived. Not to mention exhaust and component failure and head and valve train ware.
The "annoying stumble you sometimes feel" is created by the PCM with advanced timing (like it should) mixed with low octane or crapy fuel used. This "Ping" is created by accelerated fuel/air detonation mixed with a low octane or crapy fuel or warn ignition hardware.
Higher octane fuel burns slower but more complete creating better fuel mileage and less soot. The motor's are set up using GREAT fuel (in a science lab not taken under ground and who knows what) at 87 octane. This just doesn't happen in real life.
It would be much better to use what, and how your PCM and motor run and "TWEEK" it. This is where true performance/longevity comes in.
Use them together creating a good long lasting couple. Basically, run the plugs that are suppose to be in there or close to it. (remember that Dodge put millions into building this motor) Then the next step is to make sure the correct octane is being used. So unless you have up to date info on the fuel you are using then I would try a different fuel octane or station.
With installation of the colder plug it actually retards the timing but against the computer. This increases the ware of the motor because it burns the fuel/air mixture at a slower rate creating increased soot. But the PCM thinks it is burning on time which it's not! This is a BIG problem because this detonation at a retarded timing allows the motor to fully detonate after TDC creating decreased power. This is why the motor creates more soot. A motor creating soot becomes short lived. Not to mention exhaust and component failure and head and valve train ware.
The "annoying stumble you sometimes feel" is created by the PCM with advanced timing (like it should) mixed with low octane or crapy fuel used. This "Ping" is created by accelerated fuel/air detonation mixed with a low octane or crapy fuel or warn ignition hardware.
Higher octane fuel burns slower but more complete creating better fuel mileage and less soot. The motor's are set up using GREAT fuel (in a science lab not taken under ground and who knows what) at 87 octane. This just doesn't happen in real life.
It would be much better to use what, and how your PCM and motor run and "TWEEK" it. This is where true performance/longevity comes in.
Use them together creating a good long lasting couple. Basically, run the plugs that are suppose to be in there or close to it. (remember that Dodge put millions into building this motor) Then the next step is to make sure the correct octane is being used. So unless you have up to date info on the fuel you are using then I would try a different fuel octane or station.







