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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 218 (Engine Controls - Basic Diagnostic Procedures - 4.8L, 5.3L & 6.0L - Flex Fuel & Gasoline Engines) >> Fuel Systems >> Fuel System Diagnosis >> Test Description

Test Description

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The numbers below refer to step numbers on diagnostic procedure.

  1. 4 -  This step tests for an internal fuel leak.
  2. 5 -  This step tests fuel pump check valve for a leak down condition.
  3. 6 -  This step tests fuel pressure regulator.
  4. 10 -  This step tests for a loss of fuel pressure between fuel feed pipe shut-off adapter and fuel pump.
  5. 11 -  This step tests for a leaking fuel injector or for a leaking fuel pressure regulator.
  6. 14 -  This step tests for a restricted fuel return pipe.
  7. 16 -  This step determines if fuel pressure regulator or fuel pump is cause of low fuel pressure.
  8. 18 -  This step verifies that a circuit condition is not cause of a fuel pressure concern.
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