Routine No. 4 - Spark Knock Or Ping
ROUTINE NO. 4 - SPARK KNOCK OR PING
| System | Component | Reference |
|---|---|---|
| EGR | Components | QUICK TEST Procedures |
| Induction | Air Duct and Hoses, (Poor Connection or Restriction), Filter Element, Vane AFM, Intercooler | Visual & Fuel Components |
| Vacuum Distribution | Vacuum Leak(s) Spark Delay Valve Vacuum Reservoir | Visual & Audible Ignition Components QUICK TEST Procedures |
| Basic Engine | Oil Level Compression Check, Intake Manifold Gasket, Carbon Deposits | Mechanical Engine Components |
| Cooling | Overheating | DIAGNOSTIC ROUTINE #14 |
| EEC | Quick Test | QUICK TEST Procedures |
| Turbocharger | N/A | Fuel System Mechanical Components |
| Ignition Timing | Initial plus Advance and Retard Functions | Ignition Mechanical Components |
NOTE:
If the above procedures fail to correct the condition, it is recommended that the operator change brands of fuel and/or switch to a higher octane fuel.