So I did the change on the distributor cap, rotor, spark plugs, and the wires. The first thing I noticed is the gap on the old plugs were way off. A 2000 Dakota 3.9L Magnum calls for a .40 gap. These were between .50 and .60. I replaced what looked to be the cheapest distributor cap known to man (aluminum terminals) with a Summit Racing brass terminal cap. The rotor I used was also a Summit Racing rotor. I used Summit Racing 8mm wires and NGK V Power copper plugs (gaped correctly I might add). Fired up the Dakota and all is good. Last thing now on my tune up list is the transmission filter and fluid.

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very nice

 

That looks good. When I did all mine it made my truck a lot better

 

yeah myn was so bad it wasnt firing when i did myn lmao, had original plugs in it with 130 k on the tach

 

Let me know on fuel mileage difference, I got the 5.2L I get about 400 kms to 70 dollars. wondering if I should do the same.. I need to do tie rod ends too.. dam,

 

^^^ Im getting the same mileage as you I went from 8-9 to 11-12mpg when I did my plugs mine were bad!!