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Home >> GMC >> 1987 >> Forward Control 6.2 J, Automatic, 400/M40 >> Repair and Diagnosis >> Engine Performance >> Adjustment >> Tune-Up - Diesel >> Testing >> Fuel Pump
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Fuel Pump

All models use a mechanical fuel pump mounted on front right side of engine to deliver fuel to fuel injection pump on engine. Prior to testing, disconnect Pink wire for fuel injection pump electric shut-off solenoid.

FUEL PUMP SPECIFICATIONS

Pressure: psi (kg/cm2 ) Volume: Pints (Liters)
5.5-6.5 (.4-.5) .5 in 15 sec. (.24 in 15 sec.)