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Unbolt the cas from the engine, leave it plugged into the harness.... turn key to ignition on(not cranking) and turn the cas. U should here injector clicking as u spin the cas.
But to 100% verify, use the test light or noid light. Hook test light to 12volt postive and test the negative pin on the injector. While turn the cas by hand....u should see the test light flash. (Can do the same test with cas plugged in and bolted down on engine, just crank the engine over)
Were testing to see if the injector is getting its ground from the computer.
Cas send signal to ecu on engine postion while turning...computer takes that signal...knows when to fire each injector and then grounds out that circuit and the fuel injector fires.
So u have fuel pressure, so were now focused on fuel spraying into the cylinder.
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