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Home >> GMC >> 1996 >> Forward Control 4.3 W >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Basic Engine Testing - P Series (Diesel) >> Basic Fuel System Checks >> Fuel Pump Flow Test

Fuel Pump Flow Test

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  1. Disconnect fuel line at fuel filter inlet. Disconnect fuel injection pump electric shut-off solenoid wire (Pink).
  2. Crank engine for 15 seconds. If fuel pump does not supply about 1/2 pint of fuel in 15 seconds, go to FUEL SYSTEM PRESSURE TEST .
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