My GS400 is at 76k now, I'm thinking of changing spark plugs and wires, have some questions:

1, Tm or Denso?
2, really need to change the wires?
3, which brand of wires? where to get them?

Thanks!

 

wires? the 400 doesnt have wires, the coilpacks sit right on the plugs.

 

Thanks! I never notice that, I only changed plugs and wires for my LS400 long time ago, so I only need to get 8 plugs? how hard to put them in?

 

If I remember correctly you had to remove some stuff to get access to the plugs. I think there was some stuff blocking access to the coilpacks. But you better look for yourself, I only saw my shop do it once and I am really kind of vague on it.

 

if i remember right, you have to remove the air box over and turn it over coz' it's blocking something, so that means disconnecting some sensors too.

 

so which plugs? TM or Denso? any increase in power? gas mileage between them?

 

i changed from stock to tm, to be honest i didnt' notice much changes