Quote Originally Posted by 1D4LV View Post
could be the timing, but since you are going back to the shop for re-timing, i would suggest that you revert it back again to stock plugs.

i've heard din kasi of guys who are using iridium plugs tapos nagkakaroon ng misfiring/vibration when they used these. when they reverted back to the stock plugs, medyo umayos ang takbo ng engine nila.

hindi sa HT wire yan dahil, pag HT wire, may loss of power and you cannot really accelerate to more than 40 kph.
tnks for the tip sir. before the tune-up, I was using iridium and no vibrations or problems and when they changed it to stock that's when I noticed the vibrations. Natuwa nga ako nung pinalitan ng NGK kasi mura 80 petot lang isa.