Plug types make a difference??
I remember reading somewhere in a different forum that the the 4.2L engines could be picky about the type of spark plugs they use. I cant find that post on the other forums anymore but basically it said that unless you use strictly Motorcraft plugs the engines would run a little rough.
Last year I replaced my old plugs ( and they needed it bad), I put in a set of Bosch, a new PCV valve and new plug wires and since then the truck seems to idle rough. At times it even almost stalls. I was wondering if I switched to Motorcraft plugs if that would make a difference or is there something else I should be looking at?
Any suggestions would be helpful.
Whaddya mean I dont pay my bills?? Whydya think I'm broke!!
03 Lariat Crew 4x4 Line-x bedliner, Truxedo Lo-Pro QT Tonneau.
RIP [97 XL 4.2L V6]