Page 538 - Foton Workshop Manual - Tunland (AT)

04-392 DIAGNOSTICS - ENGINE CONTROL SYSTEM

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 exhaust system
(a) Check the exhaust system.
(b) Use the exhaust back pressure gauge to check whether the exhaust pipe is blocked.

Is the inspection result normal?
YES>To step 10.

No> Clean, repair or change the default parts.

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

Is the inspection result normal?
YES>To step 12.

NO >To step 11.

11 . Check the engine valve timing

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