Visual Inspection

A visual inspection for loose, disconnected, damaged, or misrouted wires and/or hoses should be made prior to diagnosing or servicing the fuel injection system. A thorough visual inspection will help find these faults and save unnecessary testing and diagnostic time.

VISUAL INSPECTION

1. Check the ignition coil electrical connections.

Ignition Coil Electrical Connection:

2. Check the canister purge solenoid vacuum and electrical connections.

Canister Purge Solenoid/Charcoal Canister:

3. Check the MAP sensor vacuum and electrical connections.

MAP Sensor Electrical And Vacuum Connections:

4. Check the alternator wiring connections, belt condition, and belt tension.
5. Check that the vacuum hoses are firmly attached to the vapor canister, and that they aren't leaking.

Vapor Canister Hose Connections:

6. Check that the engine ground strap is attached at the dash panel and at the engine.
7. Check that the heated oxygen sensor electrical connector is securely attached to the oxygen sensor lead.

Engine Ground Strap:

Oxygen Sensor Connector:

8. Check that the distributors 4-way electrical connector is fully pressed into the engine wiring harness.

Distributor Connector:

9. Check that the coolant temperature sensor's 2-way electrical connection is securely attached.

Coolant Temperature Sensor:

10. Check the vacuum hose connections at the intake plenum and the fuel pressure regulator.

CTS Electrical Connection And Air Intake Plenum Vacuum Hoses:

11. Check each 2-way electrical connector at the injector. Make sure that they are fully pushed into each injector.
12. Check that the oil pressure sending units electrical connector is fully pushed onto the oil pressure sending unit.

Oil Pressure Sending Unit Electrical Connection:

13. Check that the electrical connections and vacuum hose connections at the throttle body are all securely attached and that there are no vacuum leaks.

Throttle Body Electrical And Vacuum Hose Connections:

14. Check that the PCV vacuum hoses are securely attached to the intake manifold and the valve cover.
15. Check that the Electric EGR Transducer (EET) electrical connector is fully pushed into the EET.
16. Check that the EGR vacuum hoses are securely attached to the EET and that they are not leaking.
17. Check that the EGR tube to intake plenum are tightened to their proper toque specification.

Throttle Body Electrical And Vacuum Hose Connections:

18. Check that the power brake and speed control vacuum lines are firmly attached and that there are no leaks.

Power Brake Booster And Speed Control Vacuum Connections:

19. Check that the engine harness electrical connector is fully inserted into the main wiring harness.
20. Check that the electrical connections in the automatic transmission are fully pressed into each electrical component.

Automatic Transmission Electrical Connections (4 Speed):

Electrical Connections, 3 Speed Automatic:

21. Check distance (speed) sensor's 2-way electrical connection for proper installation.

Distance Sensor Wiring Connection:

22. Check secondary ignition cable condition, connection, and routing.
23. Check that the 60-way engine controller electrical connector is fully pushed into the Single Board Engine Controller (SBEC) connector.

Engine Controller Electrical Connections:

24. Check that all relay electrical connections are fully pushed onto their respective relays, and that the battery connections are clean and tight.

Relay Locations:

25. Check the electrical and fuel hose connections at the fuel pump. Verify that the electrical connector is fully pushed onto the fuel pump.