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Fuel System

WARNING: This page is about a different car, the 2003 Cadillac Seville and 2003 Cadillac DeVille. However, it is still accessible from the selected car via links, so may be relevant.
  1. Inspect the operation of the fuel pump. The pump should turn ON for approximately 2 seconds when the ignition is turned ON. See FUEL PUMP CIRCUIT under FUEL SYSTEMS in SYSTEM & COMPONENT TESTING - 4.6L DEVILLE & SEVILLE.
  2. Inspect for correct fuel pressure. See FUEL SYSTEM DIAGNOSIS under FUEL SYSTEMS in BASIC DIAGNOSTIC PROCEDURES - 4.6L DEVILLE & SEVILLE article.
  3. Inspect the fuel injectors and related fuses. See FUEL INJECTOR COIL TEST , FUEL INJECTOR BALANCE TEST WITH SPECIAL TOOL or FUEL INJECTOR BALANCE TEST WITH TECH 2 under FUEL SYSTEMS in SYSTEM & COMPONENT TESTING - 4.6L DEVILLE & SEVILLE article.
  4. Test for fuel contamination. See ALCOHOL/CONTAMINANTS-IN-FUEL DIAGNOSIS WITHOUT SPECIAL TOOL or ALCOHOL/CONTAMINANTS-IN-FUEL DIAGNOSIS WITH SPECIAL TOOL under FUEL SYSTEMS in SYSTEM & COMPONENT TESTING - 4.6L DEVILLE & SEVILLE article.
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