Initial Inspection and Diagnostic Overview

A visual inspection for loose, disconnected, or mis- routed wires and hoses should be made before attempting to diagnose or service the fuel injection system. A visual check helps save unnecessary test and diagnostic time. A thorough visual inspection will include the following checks:
1. Check ignition cable routing from the coil pack to the spark plugs. Verify the cable are routed in the correct order and are fully seated to the coil and spark plug.

Ignition Coil Pack Electrical Connection:

2. Check direct ignition system (DIS) coil electrical connection for damage and a complete connection to the coil pack.

Camshaft Position Sensor:

3. Verify the camshaft position sensor electrical connector is connected to the harness and not damaged.

Evaporative Canister:

Engine Coolant Temperature Sensor:

4. Ensure the engine temperature sensor electrical connector is connected to the sensor and not damaged.
5. Verify the quick connect fuel fitting is fully inserted on the fuel supply tube.

Knock Sensor And Oil Pressure Sending Unit Electrical Connection:

6. Check the oil pressure sending unit electrical connection.
7. Verify the electrical connector at the knock sensor is fully seated and not damaged.

Proportion Purge Solenoid:

8. Verify the electrical connector is attached to the Proportional purge solenoid and not damaged.
9. Verify the vacuum connection at the Proportional purge solenoid is secure and not leaking.

Proportion Purge Solenoid:

10. Verify the hoses are securely attached to the EVAP canister.
11. Ensure the harness connectors for the fuel injectors are attached to the correct injector and not damaged.
12. Verify the fuel injector harness and engine wiring harness connectors are fully inserted into the main wiring harness.

Throttle Body Vacuum Connections:

13. Check the vacuum connections at the throttle body and intake plenum.

Throttle Body Electrical Connections:

14. Ensure the idle air control motor and TPS electrical connectors are fully seated and not damaged.

Automatic Transaxle Electrical Connections:

15. Inspect the park/neutral switch wiring connection for damage. Ensure the automatic transaxle A electrical connections are not damaged.

PCV Valve And Fresh Air Hose:

16. Inspect the PCV system connections for damage.

Crankshaft Position Sensor:

17. Inspect the crankshaft position sensor electrical connector for damage.

MAP Sensor:

18. Verify the Manifold Absolute Pressure (MAP) sensor electrical connector is attached to the sensor and not damaged.

Upstream Heated Oxygen Sensor:

Downstream Heated Oxygen Sensor:

19. Check the heated oxygen sensor electrical connectors for damage.
20. Verify the engine ground strap is attached at the engine and dash panel. Inspect the strap for corrosion or damage.
21. Inspect the generator wiring connections for damage.
22. Check the accessory drive belt tension.

Powertrain Control Module (PCM) Connectors:

23. Check the 40-way electrical connectors at the Powertrain Control Module (PCM) for damage or spread terminals. Verify that the connectors are fully inserted into the PCM sockets. Ensure the wires are not stretched or pulled out of the connector.

Power Distribution Center (PDC):

24. Inspect fuses in the Power Distribution Center (PDC). Verify all fuses and relays are fully inserted into the PDC. A label affixed to the underside of the PDC cover identifies the relays and fuses in the PDC,
25. Inspect battery cable connections for corrosion.

Power Brake Booster Hose:

26. Check the power brake booster hose connection (without anti-lock brake systems).

Speed Control Vacuum:

27. Inspect the speed control vacuum connection.
28. Inspect hose and wiring connections at fuel pump module. Check that wiring connector is making contact with terminals on pump.