Page 546 - Foton Workshop Manual - Tunland (AT)

04-400 DIAGNOSTICS - ENGINE CONTROL SYSTEM

(d) Every injector shall inject the fuel according to the standard flow and have uniform
atomization.

NOTICE
When check the injection status of the injectors, the fuel amount the four cylinder

04 injectors spraying differs largely in the same conditions, then it should change the
injector. Check whether the injector nozzle has colloidal substances or not, if it has,
it may use cleaning agent to soak and spray, or it may cause the insufficient of fuel
or bad acceleration etc.

DANGER

When testing the fuel system:
• Place a note with "Caution: Flammable" in the work area.
• Must work in a well ventilated area and with a carbon dioxide extinguisher.
• Smoking is strictly prohibited when working on the fuel system. Work areas
should be away from open flames and sparks.
• Put the fuel in an explosion proof container.

Is the inspection result normal?
YES>To step 5.

No > Clean the injector. Check the working conditions of the injector again. If the
injection is still abnormal, replace the injector.

5 . Check turbocharger
(a) Check whether turbocharger can work properly.

Is the inspection result normal?
YES>To step 6.

No >Maintenance related faults.

6 . Check the motor machinery
(a) Use an endoscope to observe the in-cylinder condition.
(b) Observe and reflect the voltage changes.
(c) Disassemble and repair the motor internal fault.
Clean the carbon or disassemble and check the motor cylinder cover. Check the valve,
intake manifold has carbon deposition. Such as: the gap between the piston ring and
the cylinder is too tightly loosed, cylinder pad leaks, valve tube loose, valve does not
close well, and valve has carbon deposition.

Is the inspection result normal?

YES>To step 7.
No >Repair the internal machinery fault of the motor.

7 . Check gearbox
(a) Check whether the gearbox can work properly.
Is the inspection result normal?

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