my neighbor just paid $800 to change his plugs on his f150 3 valve
tell your neighbor to save his receipt there is currently a class action suit on this he may be able to recoup his money.
ford really messed up on that long electrode plug and a 90k plug replacement policy.
now that the 3v mod motors are getting 100k miles on them this has reared it's ugly head.
anyone out there with 50k miles on a mod motor would be wise to change the plugs now.
the correct method is cold motor, loosen 1/2 turn, spray a little carb cleaner, next day loosen 1/2 turn, bit o carb cleaner and remove
careful with the carb cleaner, takes 8 oz to hydrolock a 3v motor