The Answer is in the Smoke
We can generally understand what is wrong with a diesel engine by the colour of smoke emitted from the exhaust. There are three basic colours – black, white and blue. Black Smoke This is due to an air to fuel ratio imbalance, either the fuel system is delivering too much fuel into the engine or […]
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Engine not starting
With modern day engines try and obtain live data when cranking, things to check are, Low Fuel Pressure Modern fuel injection systems are all about pressure and volume of fuel. Many running problems could either be inadequate fuel supply to the high-pressure pump/rail/injectors or the rail/injectors are not holding the fuel within the system. The […]
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Runs rough at low RPM
Low Fuel Pressure Have a look at “Engine, not starting.” Low/ Uneven Engine Compression Low or uneven compression will result in poor combustion causing the engine to be unbalanced. To find out the compression perform a cold engine compression test or a cylinder leakage test. Compression should be between 20 to 35 bars or 300 […]
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Lack of power
At the moment on common rail systems, we are finding more high-pressure pump failures that cause the vehicle to have a lack of power or go into “limp” mode on hard acceleration. The vehicle starts ok and drives fine on light acceleration but will cut out on full acceleration. Other things to check are: Low […]
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INJECTOR BLOW-BY
Does your vehicle suffer from the following? Difficult starting Erratic or uneven tick-over or idle Lumpy running Hesitation on acceleration Smoke on tick over or acceleration Black “tar” around the injectors Chuffing sound from the engine when running It could be suffering from Injector Blow-by or the “Black Death.” Injector blow-by can be the cause […]
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Diesel knock / pinking
Faulty Diesel Injector(s) A problem resulting from worn parts or sticky nozzles are a delay in the start of injection or incorrect pre-injection which in turn results in rough running, diesel knock or pinking. For peace of mind, send your injectors in for testing. Fuel Quality and Contamination Contaminated fuel will reduce the life of […]
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