misfires bosch+4

[curtisj]

i put in a set of bosch +4 in my x and now i get a misfires when at idle not all the time just every now and then i have a friend with a f150 5.0 he just put them in his truck now he has the same type of misfires only at idle i put new wires on thinking that may be it would fix it but still same misfires do i need bosch plug wires to go with the bosch plugs

 

[flyguy]

Ya know.. it think its a +4 thing. I have had a few sets and I kept getting misfires too. Well...at least my mechanic says so. As far as im concerned, it always ran like crap.

nick

 

[CBoug76]

I have the +4's and I do not have a Missfire, I have had them in for over a year.