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Test NTC-3A - Checking Fuel Pressure

NOTE: Perform TEST NTC-1A or NTC-2A before proceeding.
WARNING: High fuel pressure may be present in fuel lines. Open fuel system with caution. See FUEL PRESSURE RELEASE .
  1. Turn ignition off. Release fuel pressure. Connect fuel pressure gauge to fuel rail. Turn ignition on. Go to next step.
  2. Using scan tool, actuate ASD fuel system. If fuel pressure is 43-53 psi (3.0-3.7 kg/cm2 ), go to TEST NTC-3B. If fuel pressure is not 43-53 psi (3.0-3.7 kg/cm2 ), record fuel pressure reading. If fuel pressure is more than 53 psi (3.7 kg/cm2 ), go to TEST NTC-3C. If fuel pressure is 53 psi (3.7 kg/cm2 ) or less, go to next step.
  3. With scan tool still actuating ASD fuel system, gently squeeze fuel return hose at end of fuel rail while observing fuel pressure gauge. If fuel pressure increases to more than 43 psi (3.0 kg/cm2 ), stop ASD fuel system actuation. Release fuel pressure. Replace fuel pressure regulator. Perform TEST VER-2A. If fuel pressure does not increase to more than 43 psi (3.0 kg/cm2 ), go to next step.
  4. Turn ignition off. Inspect fuel lines for kinks or restrictions. Repair fuel lines as necessary. Perform TEST VER-2A. If no kinked or restricted lines exist, go to next step.
  5. Release fuel pressure. Adjust a shop air hose to 40 psi. Remove fuel filter. Using shop air at 40 psi, attempt to blow air through fuel filter inlet. If fuel filter is restricted, replace fuel filter. Perform TEST VER-2A. If fuel filter is not restricted, replace fuel pump. Perform TEST VER-2A.
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