It is extremely common to see the old style injectors fail. It's so common that I would suggest only replacing them with the new style injectors that require different pigtails and fuel rail adapters. The old style injectors are prone to failure due to the ethanol added to fuels these days. You may want to research the "switched 12volt mod" while you're at it. Best way to search this site is to use google and add "site:twinturbo.net" without the quotation marks to your search terms.