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Home >> Chevrolet >> 1985 >> Impala 5.0 H >> Repair and Diagnosis >> Engine Performance >> System >> Fuel Injection System - Diesel >> Testing >> Injection Pump Housing Fuel Pressure Diagnosis >> Notes
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Injection Pump Housing Fuel Pressure Diagnosis: Notes

Connect pressure gauge; disconnect HPCA and HPAA leads. Shift into "PARK" and apply parking brake. Engine must be at operating temperature and at 1,000 RPM.