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How do you change the injectors in a 1998 GMC Sierra 1500 350 Vortec V8?
Wiki User
∙ 16y ago
The 1996-1998 vortec 350 was an updated version of the older vortec style fuel system used on the smaller v6 engines. All eight injectors are mounted inside the intake manifold. You have to split the intake manifold and remove the upper portion. Once inside you can remove the Central Sequential Fuel Injection (CSFI) unit as well as all of the attached tubes and poppet valves. CAUTION - Pay attention to the location of each injector and the location of it's corresponding tube and poppet because they must be placed in a sequential order hence the name. The injectors are popped out the bottom and then reassemble in reverse order. Hope this helps!!
Wiki User
∙ 16y ago
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