2.13. Diagnostics of malfunctions of the engine
If the engine is not started, it is necessary to look for the reason, systematically narrowing a search circle. In order that the engine in general could be started, two main conditions have to be satisfied. Air-fuel mix has to come to cylinders and on spark plugs the ignition spark has to slip. Check always should be begun with fuel supply existence. How to arrive in that case it is described in subsection 2.17.3.2.
PERFORMANCE ORDER | ||||
|
REASON
|
ELIMINATION METHOD
|
The engine is started badly or at all is not started
| |
Petrol engine
| |
Mistakes at start
| To turn the ignition key and to start so far the engine will not start working only then to release the ignition key. During start the pedal of coupling has to be squeezed out. Not to give gas. |
Only at the hot engine after start to add a little gas. | |
Diesel engine
| |
Mistakes at start
| On the cold engine: to take out up to the end the gate of the accelerator of cold start. To include ignition for a while, the control lamp of preliminary heat will not go out yet. To squeeze out coupling. At once after switching off of a control lamp to start the engine, not to press gas. As soon as the engine heats up to working temperature, to drown the gate of the accelerator of cold start up to the end. If the engine at start grabs irregularly, to continue to twist a starter (max. 1/2 min.) until the engine starts working independently. If the engine is not started, once again to make preliminary heat and to repeat start as it was described. |
At the warm engine: does not need preliminary heat. The engine can be started at once. | |
The safety lock is faulty:
| To check safety locks (see subsection 10.10). |
– electric fuel pump
| |
– electronic system of injection of fuel
| |
– systems of preliminary heat
| |
The engine power supply system is faulty
| |
It is polluted, the fuel-supply line is bent, littered the filter
| To check an engine power supply system according to diagnostics of malfunctions. |
Too slowly the starter rotates
| To charge the rechargeable battery. If seasonal oil is filled in, it is necessary to fill in winter oil in cold season. To check a starter. |
Too low pressure of a compression
| To check hydropushers, to touch the engine. |
Faulty operation of the mechanism of gas distribution
| To check the gas distribution mechanism, to check a tension of a gear belt. |
Laying of a head of the block of cylinders is punched
| To replace laying. |