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 printable version
The system EVAP
The scheme of system EVAP
A system for collecting fuel vapor prevents evaporation of fuel vapors into the atmosphere from the fuel tank, thereby preventing the formation of photochemical smog.
Fuel vapors accumulate in the canister with the activated carbon. When the engine electronic control unit opens the valve and the fuel vapor into the engine where there is their combustion.
A control valve is used to control the pressure of fuel vapors in the fuel tank.
Check
| PERFORMANCE ORDER | | 1. Disconnect the vacuum hose from throttle assembly and instead connect the vacuum pump with a vacuum hose. | | 2. Check the following parameters on a cold engine coolant temperature less than 60 ?� C, on the hot engine coolant temperature over 80 ?� C. |
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Cold engine
| The operating conditions of the engine | Underpressure | Result | | Idling | 50 kPa | The vacuum is maintained | | 3000min -1 |
A hot engine
| The operating conditions of the engine | Underpressure | Result | | Idling | 50 kPa | The vacuum is maintained | | Within 3 minutes after increasing the speed up to 3000min -1 | Trying to change the vacuum | Vacuum missing | | After 3 minutes after increasing the speed up to 3000min -1 | 50 kPa | The vacuum is maintained briefly, then offline |
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