i wen to advanced auto parts today because the check engine light on my 2002 nissan sentra has been on for a while, they did a check and told me that i had an evap leak and that i would have to take it to a mechanic so that he can run smoke through it and find out where the leak is. how much does this usually cost (i mean for them to use their machine to find the leak and then to fix it)
This Site Might Help You. RE: how much to fix evaporative emissions systems leak? i wen to advanced auto parts today because the check engine light on my 2002 nissan sentra has been on for a while, they did a check and told me that i had an evap leak and that i would have to take it to a mechanic so that he can run smoke through it and find out where the leak is. how much.
The evap system is just a hose/tube running from the top of the gas tank to a charcoal canister under the hood. It take the gasoline vapors that would normally escape out a vented gas cap and runs them thru the charcoal, which absorbs the gasoline. Later, when you start the engine, there's a vacuum line from the top of the charcoal canister to the engine, the engine sucks air thru the length of the canister, and all the nasty gas vapors get burned in the engine, there by saving the world for future generations. There is also, on some cars, a switch of some kind on the canister. Don't really know what it does, but bet you the computer knows, and that switch is probably what is triggering the error message. Now you know where to start looking - find out what the heck that switch does, why it does it, and report back .
I also have an EVAP leak. I was told it could be a variety of causes. 1. Loose gas cap- this is the cheapest fix and worth trying first. 2. EVAP Canister broke, hose cracked 3. Purge or vent solenoid defective 4. Vacuum leak at engine. I am interested in understanding the cost as well.
