been having some serious probs with milage so i am going to start throwing parts at it. any recommendations as to a good set of plugs and COP's?

 

The engine of the F150 is finicky, only use Motorcraft parts.

 

i have heard that about the plugs, but for the COP's as well?

 

I learned the hard way a few years back. I agree with Ilovemyford. For anything like that other than maybe oil/air filters or possibly spark plugs, always use genuine Motorcraft parts.

 

I have Autolite plugs HT0 and GMS coil packs both have worked great for me

 

i have autolite ht-1, for stock not supercharged or nitrous engines, use the nornal ht-1, i idle real smooth now, and im pretty sure the ht-1 is identical to motorcraft plugs, only you can get them at pepboys for 8 bucks a piece

 

I have to change my plugs still but im using the motoblue cops and they seem to be working really well.

 

im using the autolite ht1's and the granatelli cop connector kit.