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 secondary ignition cable condition, connection, and routing.
2. Check the ignition coil electrical connections.

Ignition Coil Electrical Connection:

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

Canister Purge Solenoid Electrical And Vacuum Connection:

4. Check that the vacuum hoses are firmly attached to the vapor canister, and that they aren't leaking.

Vapor Canister Hose Connections:

5. Check the alternator wiring connections, belt condition, and belt tension.
6. Check that the vacuum and electrical connections are fully pressed onto the MAP sensor, and that the vacuum hose on the intake plenum is securely attached.

MAP Sensor Electrical And Vacuum Hose Connections:

7. Check that the engine ground strap is connected at the dash panel.

Engine Ground Strap To Dash Panel:

8. Check that the oxygen sensor's 4-way electrical connector is fully pressed into the harness connector.

Oxygen Sensor Electrical Connector:

9. Check that the distributor's 4-way electrical connection is fully pushed into the harness connector.

Distributor Connector:

10. Check that the coolant temperature sensor's 2-way electrical connection is securely attached and fully pressed on.
11. Check that the 2-way electric connector at each injector is fully pressed onto each injector. Check that the vacuum connections at the fuel pressure regulator and the intake manifold are securely attached and have no leaks.

Coolant Temperature Sensor Electrical Connector:

12. Check that the oil pressure switch electrical connection is fully pressed on.

Oil Pressure Sending Unit Electrical Connection:

13. Check the throttle body vacuum hose connections and ensure that there are no leaks.
14. Check that the throttle body electrical connections are fully pushed on.

Throttle Body Electrical And Vacuum Hose Connections:

15. Check that the PCV vacuum hoses are securely attached to the intake manifold and the valve cover.
16. 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:

17. Check that the engine harness to main wiring harness electrical connections are fully pressed into each other.

Engine Harness To Main Harness Connection:

18. Check neutral safety switch for proper installation (Automatic Transmission only).
19. Check the torque converter lockup solenoid electrical connection (Automatic Transmission)
20. Check that all the electrical connections in the Electronic Automatic Transmission are fully pushed on and securely attached.

Automatic Transmission Electrical Connections (4 Speed):

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

Distance Sensor Wiring Connection:

22. Check that the 60-way engine controller electrical connector is fully pushed into the Single Board Engine Controller (SBEC).

Single Board Engine Controller (SBEC):

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

Relay Locations:

24. Check that the battery cable connections are clean and tight.
25. Check the electrical and fuel hose connections at the fuel pump. Verify that the electrical connector is fully pushed onto the fuel pump.