Tasks on a new purchase ZR1

[Matt B]

You could measure the resistance of all injectors as a valuable indication of their condition. There's a guide on Marc's page. Engine should be hot and stopped for about half an hour to ensure maximum heat soak in injector area.
Injectors can stay in place and only a few plugs have to be unplugged if you follow the instructions.

This is money well spent as faulty injectors can cause severe damage, e.g. damaged catalysts.