Page 531 - Foton Workshop Manual - Tunland (AT)

DIAGNOSTICS - ENGINE CONTROL SYSTEM 04-385

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
04
should be away from open flames and sparks.
• Put the fuel in an explosion proof container.

Is the inspection result normal?

YES>To step 7.
No > Clean the injector. Check the working conditions of the injector again. If the
injection is still abnormal, replace the injector.

7 . Check pressure of the fuel system
(a) Check pressure of the fuel system. ( Refer to " Chapter 13 Fuel system, Precaution")
Is the inspection result normal?

YES>To step 9.
NO >Repair or replace fuel system components. If the pressure is too low, go to step
8.

8 . Check the fuel supply of the fuel system
(a) Check whether it has leakage or block in the oil inlet or not.
(b) Check whether the fuel filter is blocked or not.

Is the inspection result normal?

YES>To step 9.
No >Clean and change the default parts.

9 . Check the cylinder pressure
(a) Perform the test of cylinder compression pressure.

Is the inspection result normal?
YES>To step 11.

NO >To step 10.

10 . Check the engine valve timing
(a) Check whether the engine timing gear mark is aligned, damaged or not, the belt is
loose, detaching or not.

Is the inspection result normal?
YES>To step 11.

No > Perform the alignment operation of the timing chin or change the timing chain.

11 . Check the motor machinery
(a) Use an endoscope to observe the in-cylinder condition.

Page 531