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S40 / V40 '96-'04 General Forum for the Volvo S40 and V40 (Classic) Series from 1995-2004. |
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Petrol smell near carbon canister (EVAP)Views : 1772 Replies : 22Users Viewing This Thread : |
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Mar 12th, 2017, 10:43 | #1 |
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Petrol smell near carbon canister (EVAP)
I have terrible smell in my car while waiting at a traffic light. The smell comes from the carbon canister. The hoses look good (didn't remove the bumper, but had the car on a car lift). Perhaps the canister is full? Or there is a problem with the purge valve?
The car starts good, no problems running idle, just a terrible smell in the interieur. Any good idea's? |
Mar 12th, 2017, 13:34 | #2 |
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The only thing i can think of is "have you over filled the tank?"
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Mar 12th, 2017, 16:10 | #3 |
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Don't really know. When the filling stops I always give it another shot til the next stop. I've got the problem for a long time now. The fulness of the tank doesn't make a difference.
I've read a lot about the filler cap, but does it have any influence? The rubber looks dry so perhaps it doesn't close properly, but the smell is from the canister (and sucked in by the fan) Can a bad purge valve causes gas fumes escape from the canister when idling? sorry for my bad english |
Mar 12th, 2017, 18:09 | #4 | |
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Till it clicks and no more! I have seen some posts about it here so a search should help. |
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Mar 12th, 2017, 18:19 | #5 | |
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PS: It might help if we knew which engine your V40 classic has.
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Mar 12th, 2017, 18:38 | #6 |
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Mar 12th, 2017, 18:46 | #7 | |
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Mar 12th, 2017, 19:28 | #8 | |
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Vadis: EVAP is the EVAPorative control system which processes the petrol vapour in the fuel tank. These gases harm the environment. The car has a canister with a carbon filter which can absorb a large quantity of petrol vapour while the vehicle is standing in the sun (when a lot of fuel evaporates). The vapour is then introduced into the combustion process during driving. To control this process there is a solenoid valve mounted on the canister which is operated by the engine control module (ECM). While the car is stationary the valve is closed, but there is a connection to the fuel tank. When the car is being driven the valve opens when engine coolant temperature (ECT) exceeds +60°C and the intake air temperature (IAT) exceeds −10°C. A connection is then made with the engine intake manifold. The valve is operated by an 8 Hz pulsed signal. While the canister is open the injection times are adjusted with the heated oxygen sensor (HO2S) providing feedback. The system is adaptive, so that the canister can be completely purged. Even at wide open throttle (WOT) (oxygen sensor not working) the system remains in operation. |
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Mar 12th, 2017, 19:32 | #9 | |
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Mar 12th, 2017, 19:54 | #10 |
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