SHIM PACK 2008644 - Caterpillar

Probable Causes
Fuel supply
Electrical connectors or power supply
No signal from the speed/timing sensor
Ignition system
Incorrect base timing
Excessive loadRecommended Actions
Fuel Supply
Use Cat ET to check that the engine's fuel parameters are correct for the fuel that is being used. If necessary, perform fuel analysis in order to confirm the fuel quality.Verify that the fuel pressure is correct. When possible, interview the operator in order to determine if fuel quality is in question. Try to determine if the source of the fuel has been changed.Ensure that fuel is supplied at a sufficient pressure that is stable. Check that the size of the fuel line is sufficient. Inspect the fuel system for leaks.The following conditions can affect engine starting:
Low fuel pressure
High fuel pressure
Poor fuel qualityInspect the following fuel system components:
Fuel filter
Gas pressure regulator
Gas shutoff valve
Fuel metering valveVerify that the system's components are operating correctly.Repair suspect components. Replace the fuel filter, if necessary.Electrical Connectors or Power Supply
There may be an intermittent interruption of power. Check the wiring harnesses and the connectors. Inspect the connectors in each of the terminal boxes for problems. Inspect the power supply connections and the ground connections.Inspect the wiring from the power supply to the ECM. Check the power and ground connections to each of the control modules. Refer to Troubleshooting, "Electrical Power Supply - Test".No Signal from the Engine Speed/Timing Sensor
Use Cat ET to view the status of "Engine Speed". Crank the engine in order to verify that the ECM is receiving a signal from the engine speed/timing sensor.If necessary, confirm that the engine speed/timing sensor is installed correctly. Refer to Troubleshooting, "Speed/Timing - Test".Check that the timing wheel is correctly installed.Ignition System
Inspect the ignition transformers for the following conditions: loose connections, moisture, short circuits and open circuits. Inspect the primary wiring and the secondary electrical connections.Ensure that the correct transformers and spark plugs are installed. Inspect the extenders for signs of pin holes and of electrical arcing. Check the spark plugs for fouling, correct gap adjustment, and moisture.Maintain the spark plug according to Operation and Maintenance Manual, "Ignition System Spark Plugs - Replace".Incorrect Base Timing
Verify that the base timing is correct. Refer to Systems Operation/Testing and Adjusting, "Ignition Timing - Adjust".Excessive Load
Check that the load is not excessive. Reduce the load. If necessary, disengage the driven equipment and test the engine.Check the air supply if the engine is equipped with an air starting motor. For engines that are equipped with electric starting motors, check the battery connections and the requirements for the cable sizes.