1990 Nissan 300zx egr delete PCV, EGR, and Coolant Hardline Delete … Mar 10, 2016 · Reinstallation recap of components associated with a PCV, EGR, and coolant hardline delete on a 1990 Nissan 300ZX Twin Turbo. Basically... Source Source Source Source Source Source Source Source Source Source Read Also: Nissan 300zx aiv delete Nissan 300zx egr delete Nissan 300zx carbon canister delete Nissan 300zx egr delete kit Nissan 350z muffler delete Nissan 350z rear wiper delete plug