I'm going to change out the plugs and coils on my 2000 f-150 4.6 for the first time.
Its' missing bad.
Which plugs should I get?

 

Denso Iridiums, Motorcraft or NGK.

Ignition system ? Is it COP CoilOverPlug system or do you have CoilPacks and plug wires. The 2000 4.6L's came with either or that year lol.

 

I have a 97 and a 98 with 4.6's. I use the best of what the factory says to use. They have coil packs and wires. Have them since new and done this a fewtimes. This is something you donot want to do again in a month!!!!!! Coil overs are easier.

 

They are coil over's. What are the factory plugs?

 

Factory plugs are Motorcraft. Good plugs, but they're not Iridium's. Denso Iridium's are an upgrade from the Motorcraft spark plugs, so are the NGK's.
These are the 3 you can run without a problem in these engines.

Good Coils are around 9 -12 bucks apiece for that one.

 

Denso Iridium makes 4 different plugs for my truck:
Iridium power
double platnum
platnum tt
resistor plug
What type should I order?

 

Iridium Power. I believe they're 15's or 16's

 

https://www.rockauto.com/catalog/rac...&parttype=1792

DENSO Part # 5325 More Information About this Part {#IT16} Iridium Plug

 

I just replaced mine in my 2002...last time I used Autolites, big mistake. That was before I was on the forum a lot...Jbrew, you showed me the light, I went with Motorcraft..runs so smooth now, nice idle..very happy