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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 the fuel system circuits for proper operation. Go to FUEL PUMP ELECTRICAL CIRCUIT DIAGNOSIS (ALERO & GRAND AM) or FUEL PUMP ELECTRICAL CIRCUIT DIAGNOSIS (IMPALA & MONTE CARLO) under FUEL SYSTEMS in SYSTEM & COMPONENT TESTS - 3.4L ALERO, GRAND AM, IMPALA & MONTE CARLO article.
  2. Check for low fuel pressure. Go to FUEL SYSTEM DIAGNOSIS under FUEL SYSTEMS in SYSTEM & COMPONENT TESTS - 3.4L ALERO, GRAND AM, IMPALA & MONTE CARLO article.
  3. Check for faulty 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.
  4. Inspect for fuel in the pressure regulator vacuum hose.
  5. Ensure that each injector harness is connected to the correct injector/cylinder.
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