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Home >> Chevrolet >> 1990 >> Corvette ZR-1 >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Basic Testing >> Basic Fuel System Checks >> Fuel System Pressure Test (EFI) >> Fuel Pressure Check (PFI)
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Fuel Pressure Check (PFI)

  1. Relieve fuel pressure as previously described in FUEL PRESSURE RELIEF (PFI). Connect Fuel Pressure Gauge (J-34730-1) to fuel pressure fitting on fuel rail.
  2. With gauge installed at fuel rail connector, turn ignition on. With ignition on and engine off, pressure should read within specification. See SPECIFICATIONS - 4-CYL article (for 4-cylinder models), See SPECIFICATIONS - V6 article (for V6 models),See SPECIFICATIONS - V8 article (for V8 models). Start engine. Pressure should drop 3-10 psi (.2-7 kg/cm2 ). For more details on fuel system pressure testing, see SYSTEM/COMPONENT TESTS article.
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