Re: Spark Plugs for 2001 Z150TLRZ? 150hp HPDI
like I say and like bruceAML posted, on a case by case basis there were some ECU updates, the only good way to tell which plug you need is now by the ign coil primary connectors.
there is a tech bulliten out, if you dont beleive us,and I dont blame you, simply read them and it works.
if your local dealership doesnt mind they can pull almost all of the bullitens pertaining to your HPDI right off the YDS system.