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Home >> Pontiac >> 1989 >> Grand Prix V6-191 3.1L >> Repair and Diagnosis >> Powertrain Management >> Tune-up and Engine Performance Checks >> Fuel Pressure >> Specifications

Fuel Pressure: Specifications



FUEL PRESSURE:

Ignition ON Engine OFF 40.5 to 47.0 psi

With Regulator Vacuum Applied [1] 3.0 - 10.0 psi Less than Ignition ON Engine OFF

REMARKS:
[1]
May be checked with either of the following methods.
^ With Pressure Regulator Vacuum Line Attached at normal idle speed.
^ Ignition ON Engine OFF with 10 Inches Of Vacuum Applied To The Pressure Regulator.