2016 3.5 EB
I bought a new set of plugs and tightened the gap to 028.
put them in and noticed a rpm static noise. somebody said iridiums cant be gapped, I thought I had it fixed by unplugging a cop while running and changed the 1 plug to no avail. so I bought another set of plugs, gapped at the stock 032. put them in and still have static. seems to sound from 1 cylinder, rpm related.
but seems to come and go, its not constant.
any chance a spring connector in a cop or a cop is at fault?
any ideas?

 

Grounds..... do the big three and you should notice a difference. If you dont know what Big 3 is, Google it. Lots of good info on it.

 

Why did you have to replace plugs already?

 

started off by reading in a forum how tightening the gap is better for 3.5 eb tt.

 

it is.....alot of these plugs leave the assembly line with the gaps all over the place. It's always good to pull each one and check them before ordering new ones....

 

ive again pulled the harness plug off the cop for the center cyl pass side and the static stopped. ok I ordered a new coil from rock auto $56.78 ish shipped. hopefully this is it, but their write ups on their different brands calls the motorcraft as designed to get rid of ignition noise.
I bought the original equip brand "denso" just in case another trip to my favorite moneypit ford. keep it original looking. part is on its way. I don't know...yet

this is 2016 f150 xl supercab 3.5 eb tt
with mods
less than 8000 miles

the motorcraft part is less than the denso ?

 

new coil cleared problem. only 8000 miles