Diesel Engine Fault & Diagnostics
The following is a sample of some of the problems we at Diesel Injection have come across in our 42 years of service. It is by no means a conclusive list. It will provide some of the basic tools
need to help diagnose your engine. If you have further questions, please feel free to contact us.

1. If your having problems starting your engine cold.
 2. If you are having problems starting your engine hot.
3. If your engine runs & then dies.
4. If your engine misses and surges.
5. If your vehicle smokes excessively black.
6. If your vehicle smokes excessively white.
7. Vehicle has no power.
8. Turbocharger operation and service tips.


1. If your having problems starting your engine cold.

a.) Check the charge level of the battery and all battery connections
b) Check the engine cranking R.P.M.
c) Check for proper fuel supply.
d) Check engine compression
e.) Proper operation of the glow plug system
f) Engine oil viscosity and level(Powerstroke only)
g) Have the diagnostic codes run
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2. If you are having problems starting your engine hot.

a) Check the charge level of the battery and all battery connections
b) Check the engine cranking R.P.M.
c) Check for proper fuel supply
d) Engine oil viscosity and level(Powerstroke only)
e.) Proper pump and /or injector operation.
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3. If your engine runs & then dies.

a) Check for proper fuel supply
b) Engine oil viscosity and level(Powerstroke only)
c) Proper operation and connection to all engine control sensors
d) Proper pump and/or injector operation.
e.) All electrical connections under the hood and to the PCM.(If applicable)
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4. If your engine misses and surges.

a) Check all connections in the fuel supply system. This could be a sign of air in the lines.
b) Check to see in you have aeration (foaming) of the engine oil(Powerstroke only)
c) Proper pump and/or injector operation.
d.) Check engine compression
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5. If your vehicle smokes excessively black.

a) Check for a restricted airflow to the engine.
b) Check for proper turbo operation and boost.
c) Proper injector operation
d) Check for proper fuel supply and a clean fuel filter
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6. If your vehicle smokes excessively white.


a) Have the diagnostic codes run.
b) Have the injectors checked
c) Check compression
d) Check glow plug system for white smoke during start up.
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7. Vehicle has no power.

a) Check for a restricted airflow to the engine.
b) Check for proper turbo operation and boost.
c) Proper injector operation
d) Engine oil viscosity and level(Powerstroke only)
e) Check for proper fuel supply and a clean fuel filter
f) Check compression
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88. Turbocharger operation & Service Tips

TTurbocharging forces compressed air into an engine to achieve improved engine performance
and fuel efficiency, with reduced exhaust emissions

The turbocharger is driven by waste exhaust
gases, forced through an exhaust housing
onto a turbine wheel. The turbine wheel is
connected by a common shaft to a
compressor wheel. As the exhaust gases hit
the turbine wheel so both wheels rotate
simultaneously. Rotation of the compressor
wheel draws air in through a compressor
housing, forcing compressed air into the
engine cylinder.
The increase in air fed into the engine
creates more combustion force and power.




Turbochargers operate at very high temperatures, high speeds and high pressures. Optimum performance can only be achieved by the proper operation, maintenance and service.

Service Tips

Make sure your turbo is serviced at
the recommended intervals.

Use only qualified and experienced
specialists to service your turbo.

Check out any oil leaks, excessive
or unusual noise and vibration as
soon as they occur.

Lack of power, excess noise, black
and blue smoke are more likely to indicate engine problems, than turbo problems.

Wait for the engine oil to reach normal operating temperature before "revving"

Let the engine idle for a couple of minutes before switching off.


 

 

NOTE: All names, numbers, symbols and descriptions are for reference purposes only and do not imply that any part is the product of these
manufacturers.
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