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Home >> Chevrolet >> 2002 >> Tracker 2D Utility, 4WD, Automatic >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Basic Diagnostic Procedures >> Basic Fuel System Checks >> Fuel System Pressure Test (2.0L) >> Diagnostic Procedure
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Diagnostic Procedure

  1. Perform OBD system check. See DIAGNOSTIC SYSTEM CHECK - ENGINE CONTROLS under SELF-DIAGNOSTIC SYSTEM in SELF-DIAGNOSTICS - 2.0L TRACKER article. After performing diagnostic system check, go to next step.
  2. Turn ignition off. Install fuel pressure gauge. Ensure vehicle has an adequate supply of fuel. Turn ignition on with engine off. Fuel pump should run for about 2 seconds. Observe fuel pressure gauge. If fuel pressure exists, turn ignition off and go to next step. If fuel pressure does not exist, go to step  13.
    3. NOTE: In order to obtain maximum fuel pressure it may be necessary to cycle ignition on and off more than once.
  3. Turn ignition on with engine off. Fuel pump should run for about 2 seconds. Observe fuel pressure gauge while fuel pump is running. If fuel pressure is 36-43 psi (250-300 kPa), go to next step. If fuel pressure is not 36-43 psi (250-300 kPa), go to step  11.
  4. Turn ignition off. Observe fuel pressure gauge for one minute after fuel pump stops. If fuel pressure holds at 25 psi (180 kPa) or more, go to next step. If fuel pressure does not hold at 25 psi (1.80 kPa) or more, go to step  7.
  5. Attempt to start engine. If vehicle starts and runs, go to next step. If vehicle does not start and run, diagnose fuel injector circuit. See FUEL INJECTOR CIRCUIT DIAGNOSIS under FUEL CONTROL under FUEL SYSTEMS in SYSTEM & COMPONENT TESTING - TRUCKS - TRACKER article.
  6. Warm engine to normal operating temperature. Observe fuel pressure gauge. If fuel pressure is 30-37 psi (210-260 kPa), system is okay. If fuel pressure is not 30-37 psi (210-260 kPa), go to step  9.
  7. Check fuel injectors, and fuel feed pipes and hoses for leaks. Repair as necessary. After repairs, go to step  19. If no problem is found, go to next step.
  8. Turn ignition on. Fuel pump should run for about 2 seconds. Observe fuel pressure gauge immediately after fuel pump stops while blocking (pinching) fuel feed hose between fuel pressure gauge and fuel pump. If fuel pressure holds at 25 psi (180 kPa) or more, go to step  18. If fuel pressure does not hold at 25 psi (180 kPa) or more, go to next step.
  9. Turn ignition on with engine off. Fuel pump should run for about 2 seconds. Observe fuel pressure gauge while blocking (pinching) fuel return hose. If fuel pressure holds at 25 psi (180 kPa) or more, go to step  17. If fuel pressure does not hold at 25 psi (180 kPa) or more, go to next step.
  10. Check for faulty or improperly operating fuel injectors. See FUEL INJECTOR BALANCE TEST under FUEL CONTROL under FUEL SYSTEMSS in SYSTEM & COMPONENT TESTING - TRUCKS - TRACKER article. Check for leaking fuel pressure regulator. Repair or replace as necessary. After repairs, go to step  19.
  11. If fuel pressure is less than 36 psi (250 kPa), turn ignition off and go to next step. If fuel pressure is 36 psi (250 kPa) or more, go to step  15.
    12. NOTE: In order to obtain maximum fuel pressure it may be necessary to cycle ignition on and off more than once.
  12. Turn ignition on. Fuel pump should run for about 2 seconds. Observe fuel pressure gauge while blocking (pinching) fuel return hose. If fuel pressure is 57 psi (400 kPa) or more, go to step  17. If fuel pressure is less than 57 psi (400 kPa), go to next step.
  13. If fuel pump relay diagnostic procedure was performed, go to next step. If fuel pump relay diagnostic procedure was not performed, go to FUEL PUMP ELECTRICAL CIRCUIT DIAGNOSIS . After performing fuel pump electrical circuit diagnosis, go to next step.
  14. Check for restrictions in fuel feed pipe, hose or fuel filter. Check for restrictions or leaks in fuel feed pipes, hoses or connections inside fuel tank. Inspect fuel pump circuit. Ensure battery voltage is present at fuel pump connector and that ground circuit has less than 5 ohms resistance to ground. Repair as necessary. After repairs, go to step  19. If no problem is found, go to step  18.
  15. Turn ignition off. Relieve fuel pressure. See FUEL SYSTEM PRESSURE RELIEF . Disconnect fuel return hose from fuel pressure regulator. Connect a new fuel hose to fuel pressure regulator. Place other end of hose in approved gasoline container. Turn ignition on with engine off. Observe fuel pressure. If fuel pressure is 36-43 psi (250-300 kPa), go to next step. If fuel pressure is not 36-43 psi (250-300 kPa), go to step  17.
  16. Repair or replace restricted fuel return pipe or hose. After repairs, go to step  19.
  17. Replace fuel pressure regulator. After repairs, go to step  19.
  18. Replace fuel pump. After repairs, go to next step.
  19. Operate vehicle under conditions which original symptom was noted. If system operates properly, system is okay. If system does not operate properly, check for intermittent conditions. See INTERMITTENTS in TROUBLE SHOOTING - NO CODES - TRUCKS article.
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