[j rick kirby]

I think your car stinks because of not having any cats and the puff at start up is usually caused by a little oil that has puddled in the intake after having been drawn in thru the PCV system. I use the regular copper NGK TR6 and they work just fine. Unless you have a cracked or broken plug or they are completely worn out you probably won't notice any driveability difference by changing them. If your plugs, and filters are good and you really are feeling a lack of power then your problem is likely one or more coils that are weak. A fresh set of coils on my 150,000 mile motor that was fish biting really woke it up and it feels new again. Coils can work fine when cold but as they warm up and the components expand then sometimes a gap will occur in the windings and they fail to function properly.