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Fuel System

WARNING: This page is about a different car, the 2003 Pontiac Grand Am, 2003 Oldsmobile Alero, 2003 Chevrolet Monte Carlo, and 2003 Chevrolet Impala. However, it is still accessible from the selected car via links, so may be relevant.
  1. Check for incorrect fuel pressure. Go to FUEL PRESSURE TEST under FUEL SYSTEMS in BASIC DIAGNOSTICS PROCEDURES - 3.4L ALERO, GRAND AM, IMPALA & MONTE CARLO article.
  2. Check the fuel injectors. Go to FUEL INJECTOR CIRCUIT DIAGNOSIS , FUEL INJECTOR BALANCE TEST WITH SPECIAL TOOL or FUEL INJECTOR BALANCE TEST WITH TECH 2 under FUEL SYSTEMS in SYSTEM & COMPONENT TESTING - 3.4L ALERO, GRAND AM, IMPALA & MONTE CARLO article.
  3. Check for a contaminated fuel condition. Go to ALCOHOL/CONTAMINANTS-IN-FUEL DIAGNOSIS WITH SPECIAL TOOL or ALCOHOL/CONTAMINANTS-IN-FUEL DIAGNOSIS WITHOUT SPECIAL TOOL under FUEL SYSTEMS in SYSTEM & COMPONENT TESTING - 3.4L ALERO, GRAND AM, IMPALA & MONTE CARLO article.
  4. Verify that each injector harness is connected to the correct injector or cylinder. Relocate injector harnesses as necessary.
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