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 that the Direct Ignition System (DIS) ignition coil electrical connector is fully pressed into the ignition coil pack.

Ignition Coils Electrical Connection:

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

Canister Purge Solenoid/Charcoal Canister:

3. Check that the cam position sensors 3-way electrical connector is fully inserted into the cam position sensor.
4. Check the engine temperature sensor connector for good contact.

Cam Sensor Electrical Connection:

5. Check that the coolant temperature sensors 2-way electrical connector is fully inserted into the coolant temperature sensor.

Coolant Temperature Sensor (View With Coil Removed):

6. Check that the quick-connect fuel fittings are completely snapped together at the fuel supply and return tubes.
7. Check the vacuum connection at the fuel pressure regulator, and ensure that there are no leaks.

Fuel Pressure Regulator Vacuum Connection:

8. Check that the oil pressure sending units electrical connector is fully pushed onto the oil pressure sending unit.

Oil Pressure Sending Unit Electrical Connection:

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

Vapor Canister Hose Connections:

10. Check each 2-way electrical connector at the injector. Make sure that they are fully pushed into each injector.
11. Verify that the fuel injector and engine wiring harness connectors are fully inserted into the main wiring harness connector.
12. Check the throttle body vacuum hose connections are securely attached and ensure that there are no leaks.

Throttle Body Electrical Connections:

13. Check that the electrical connections in the automatic transmission are fully pressed into each electrical component.

Automatic Transmission Electrical Connections (4 Speed):

14. Check that the charge temperature sensor electrical connector is fully pushed into the charge temperature sensor.
15. Check that the vacuum hose connections are securely attached to the throttle body, and that they aren`t leaking.

Charge Temperature Sensor:

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

PCV System:

17. Check that the crankshaft position sensor, the knock sensor, and the distance sensor electrical connectors are fully pushed into their respective components.

Crank Position And Knock Sensor Locations:

18. Check that the MAP sensor 3-way electrical connection is fully inserted into the MAP sensor.
19. Check that the engine ground strap is securely attached to the engine and the dash panel.

MAP, Oxygen Sensors And Ground Strap Location:

20. Check that the alternator electrical connections are fastened securely, and that the belt is tight.
21. Check that the 60-way engine controller electrical connector is fully pushed into the Single Board Engine Controller (SBEC) connector.

Engine Controller Electrical Connections:

22. Check that the battery terminals are clean and that the cables are tightened securely.
23. Check that the power brake booster vacuum lines are firmly attached and that there are no leaks.

Power Brake Booster Hose:

24. Check that the speed control vacuum lines are securely attached and that there are no leaks.

Speed Control Vacuum:

25. Check secondary ignition cable condition, connection, and routing.
26. Check that all relay electrical connections are fully pushed onto their respective relays.

Relay Locations:

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