| Cause |
Correction |
| Engine is being lugged down |
Use a lower gear |
| Intake air inadequate or overheated |
Inspect/replace the air cleaner
element and look for the other restrictions. If the vehicle
is equipped with a valve to switch the intake source from
under the hood to outside, position the valve for the season.
* Coolant passages plugged in the aftercooler. * Check the
charge air cooler for internal restriction. Replace the restricted
cooler. * Check and clean the debris from the front of the
charge air cooler. |
| Exhaust restriction |
Check for any exhaust restriction
and repair |
| Air leak between the turbocharger
and the intake manifold |
Check/correct leaks in the air
crossover tube, hoses, or through holes in the manifold cover |
| Charge air cooler malfunctioning |
Check for plugged charger air
cooler, internal charge air restriction, or leaking charge
air cooler. |
| Exhaust leak at the manifold
or turbocharger |
Check and correct any leaks in
the exhaust manifold or turbocharger gaskets. Look for a
cracked exhaust manifold. |
| Turbocharger wastegate malfunctioning |
Repair or replace the wastegate. |
| Turbocharger worn or malfunctioning |
Check for the specified boost
pressure. Refer to the turbocharger boost pressure specification.
Inspect and replace as necessary. |
| Extra injector sealing washer
installed under injector. This in only applicable on new
overhauls |
Remove the extra sealing washer. |
| 7 mm injector installed with
a 9 mm sealing washer on CDC engines. |
Remove the injector and install
the proper sealing washer. |
| Injectors worn or malfunctioning
-or- incorrectly installed. |
Check the injectors and replace
any malfunctioning injectors. |
| Fuel injection pump malfunctioning |
Remove the fuel injection pump
and repair or replace as necessary |
| Piston rings NOT sealing (blue
smoke) |
Perform a compression check and
correct as required. |
| Fuel injection pump timing is
incorrect. |
Check and time the fuel injection
pump |
