PIPE AS-TAIL 7Y1315 - Caterpillar

Probable Causes
Diagnostic codes
Parameters in the Electronic Control Module (ECM)
Electrical connectors
Air intake and exhaust system
Valve lash
Turbocharger (if equipped)
Fuel supply
Low compression (cylinder pressure)Recommended Actions
Do not crank the engine continuously for more than 30 seconds. Allow the starting motor to cool for two minutes before cranking the engine again.
Diagnostic Codes
Use one of the following methods to check for active diagnostic codes:
The electronic service tool
The display on the control panelElectronic Service Tool
Connect the electronic service tool to the diagnostic connector.
Check for active diagnostic codes on the electronic service tool.
Investigate any active codes before continuing with this procedure. Refer to Troubleshooting, "Troubleshooting with a Diagnostic Code". Display on the Control PanelNote: The following procedure is only applicable if the application is equipped with a display on the control panel.
Check the display on the control panel for active diagnostic codes.
Troubleshoot any active codes before continuing with this procedure. Refer to Troubleshooting, "Troubleshooting with a Diagnostic Code". ECM Parameters
Use the electronic service tool to verify that the correct engine rating has been provided.
Use the electronic service tool to verify the maximum engine speed limit.
Ensure that the repairs have restored the expected performance.
If the repairs have not eliminated the faults, proceed to "Electrical Connectors". Electrical Connectors
Turn the start switch to the ON position.
If equipped, use the electronic service tool to verify that the intake manifold pressure is zero 0.5 kPa (zero 0.070 psi). Check the 5 VDC sensor supply for the intake manifold pressure. Refer to Troubleshooting, "Engine Pressure Sensor Open or Short Circuit - Test".
Use the electronic service tool to verify the throttle position status.
Run the engine until the speed is equal to the maximum no-load speed.
Use the electronic service tool to make sure that the throttle is set to reach the maximum no-load speed.
If the maximum no-load speed cannot be obtained refer to Troubleshooting, "Throttle Switch Circuit - Test".
If the engine speed is erratic refer to Troubleshooting, "Analog Throttle Position Sensor Circuit - Test".
If the fault has not been eliminated, proceed to "Air Intake and Exhaust System". Air Intake and Exhaust System
Check the air filter restriction indicator, if equipped.
Ensure that the air filter is clean and serviceable.
Check the air intake and the exhaust system for the following defects:
Blockages
Restrictions
Damage to the air intake and exhaust lines and hoses
Make all necessary repairs to the engine.
If the fault has not been eliminated, proceed to "Valve Lash". Valve Lash
Check the valve lash. Refer to Systems Operation, Testing, and Adjusting, "Engine Valve Lash - Inspect".
If any repair does not eliminate the fault, proceed to "Turbocharger (If Equipped)". Turbocharger (If Equipped)
Note: The turbocharger that is installed on the engine is a nonserviceable item. If any mechanical fault exists, then the faulty turbocharger must be replaced.
Ensure that the mounting bolts for the turbocharger are tight.
Check that the oil drain for the turbocharger is not blocked or restricted.
Check that the compressor housing for the turbocharger is free of dirt