K 2500 Suburban 4WD V8-454 7.4L (1994)
Fuel Injector: Testing and Inspection
PROCEDURE
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Connect fuel pressure gauge.
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Block off (pinch) return line.
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Power up fuel pump (engine "OFF") by applying 12 volts to fuel pump "test" terminal.
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Verify fuel pressure is stabile and remains constant.
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Visually inspect injectors for evidence of fuel dribbling.
