NC SW6 - Chart A13: Engine Exhaust Smoke (Black Smoke)

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Fault Finding
CHART A13—Engine exhaust smoke excessive (Black smoke)
Cause
Remedy
Engine being lugged down. Use appropriate gear for the task.
Air intake or exhaust system is blocked. Visually check the air intake and exhaust intake for blockage or
obstruction-remove as required. Check the air filter elements for
signs of blocking-replace as required.
Air leak between turbocharger and the intake
manifold.
Check/correct leaks in the air crossover tube, hoses, or through
holes in the manifold cover.
Exhaust leak at the manifold or turbocharger. Check/correct leaks in the manifold or turbocharger gaskets. Look
for a cracked manifold.
Turbocharger waste-gate faulty. Repair or replace waste-gate.
Turbocharger malfunction. Replace turbocharger.
One or more injector worn or
malfunctioning.
Check and externally clean the injector. If the problem still
persists, the injector must be checked by a FIE specialist or replace
with new.
Worn or malfunction fuel injection pump
(FIP). Injection pump not delivering fuel.
Check for operation of the FIP.
The FIP must be taken to a local FIE specialist to have the fuel
delivery timing checked. Ensure that all obvious causes have been
eliminated before removing the FIP. (Needs to be, Delphi DP210
capable agent for mechanical engines and for common rail
electronic engines see Delphi agent or JCB dealer
(www.delphi.com or www.jcb.com)
Injection pump timing incorrect.
• Retarded if smokes under load and
engine quieter than normal.
• Advanced is smokes under load and
engine noisier than usual.
If the pump has recently been removed and replaced the timing
could be incorrect if the correct removal procedures were not
followed.
The timing can only be checked by a FIE specialist using the
correct equipment.
Engine compression low in one or more
cylinders.
Check the engine compression.