Engine Starts Hard or Fails to Start Cold

Check the following:

1. Ignition coil [1]

2. High tension cable [1]

3. Spark plugs [1]

4. Air pre-heat valve vacuum switch on air cleaner assembly [2]

5. Coolant temperature sensor faulty [3]

6. Fuel pump and fuse Testing and Inspection
7. Fuel pump relay Testing and Inspection

8. Fuel filter clogged Digifant I

9. Vacuum (intake air) leak

10. Low fuel pressure. Refer to "Fuel System Pressure Test".

11. Fuel injection control unit faulty [3]

[1] For testing procedure refer to, IGNITION SYSTEM. [1][2]Ignition System

[2] For testing procedure refer to, EMISSION CONTROL SYSTEMS. Emission Control Systems

[3] For testing procedure refer to, COMPUTERS AND CONTROL SYSTEMS. Computers and Control Systems

NOTE: After each symptom, the sub-system that could be the source of the symptom are listed and should be checked in the order they are listed, beginning with #1.