on a gsr i know i need to wire the secondaries but the when i looked up the wiring on hybridgarage.com they only say to hook up one wire, pink/blue, to A17, does the second wire just go to a ground on the block or to a ground on the ecu?,

also what is an EVAP purge valve? and where is it located?

 

that will go to ecu ground---you could tap that from the driver's side engine harness--yello/black---same ones going to your injectors.

 

if its an obdI engine, ground it. if its obdII then to a 12+v switched source. dont worry about the evap thing, its for emissions. if you really want it to work splice the wire going into a17 so it goes to a20 also.

 

if the EVAP isn't wired will i get aa check engine light?