My 4.0 has about 72k on it with original spark plugs. Im thinking about changing them. Should i stick with stock motorcrafts or is there anything out that is really good for the sohc?? OH and also anyone here runing a screaming demon coil pack and is it any good?

 

Stock plugs work well in a stock engine. Motorcraft or Autolite will work just fine. If your coil pack is good I wouldn't spend the extra cash for the screamin demon. I have heard that Denso Iridiums will smooth out the idle a bit but I have never tried them.

 

Motorcraft or autolite plugs for these engines.
I wouldn't waste the money on "performance" coil packs.

 

I wana get Denso's for my 04 but I'm around the 40k

 

If your stock.. then stick with the ford motorcrafts.

If your boosting it.. IMO a set of Denso-IT20 is the way to go. (check out my web page)

Rich

 

motorcraft FTW!!

 

I replaced mine with Bosch Platinum +2's. No issues thus far. Run some Seafoam through your engine before you replace the plugs.

 

Is a screaming demon coil pack any better than stock?

 

Not by much. Only buy the SD coil pack if your stock coil pack goes bye-bye.

 

What is an SD coil pack?

 

screaming demon coil pack

I would post up the stuffforyourranger link but the site is down.....

 

Can one be used on a 3.0?

 

Yep! Just make sure you get the 3.0 one. Most guys on here get them from this site:

http://www.stuffforyourranger.com/st...or_maintenance

But as you can see they are down at the moment.

 

Thanks guys

 

new to this site, been browsing the posts, what sticks out are the dates, there's some old posts, or am I just reading it wrong?

 

Yep, Rangers have been around for a few decades now, along with other Ford models with the same drive trains.

 

That's not what he was noticing, It's the old threads, like this 10 year old one he drug up.