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 for correct spark plug cable routing. Ensure that the cables are completely connected to the spark plugs and distributor.

Ignition Coil Electrical Connection:

2. Check ignition coil electrical connections.

Proportional Purge Solenoid Valve:

3. Verify that the electrical connector is attached to the Proportional Purge Solenoid.
4. Verify that vacuum connection at the duty cycle Proportional Purge Solenoid valve is secure and not leaking.

Map Sensor Electrical And Vacuum Connections:

5. Verify that the electrical connector is attached to the MAP sensor.
6. Check generator wiring connections. Ensure the accessory drive belt has proper tension.

Evaporative Canister:

7. Verify that hoses are securely attached to the evaporative canister.

Engine Ground Strap:

8. Verify the engine ground strap is attached at the engine and dash panel.
9. Ensure the heated oxygen sensor connector is connected to the harness connector.

Distributor Connector:

10. Verify the distributor connector is connected to the harness connector.

Coolant Temperature Sensor Electrical Connections And Vacuum Hose Connections At The Air Intake Plenum:

11. Verify the coolant temperature sensor connector is connected to the harness connector.
12. Check vacuum hose connection at fuel pressure regulator and intake plenum connector.
13. Ensure the harness connector is securely attached to each fuel injector.

Oil Pressure Sending Unit Electrical Connection:

14. Check the oil pressure sending unit electrical connection.
15. Check hose connections at throttle body.

Throttle Body Electrical And Vacuum Hose Connections:

16. Check throttle body electrical connections.

Positive Crankcase Ventilation (PCV) System:

17. Check PCV hose connections.

EGR System:

18. Check EGR system vacuum hose connections.
19. Check EGR tube to intake plenum connections.
20. Check power brake booster vacuum connections.
21. Check engine harness to main harness electrical connections.

Electronic Automatic Transaxle Electrical Connections:

22. Check all electronic automatic transaxle electrical connections.

Powertrain Control Module (PCM):

23. Inspect the Powertrain Control Module (PCM) 40-way electrical connectors for damage or spread terminals. Verify the connectors are fully inserted into the socket of the PCM. Ensure that wires are not stretched or pulled out of the connector.
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. Check Battery Cable Connections.
26. Check hose and wiring connections at fuel pump module. Check that wiring connector is making contact with terminals on pump.