Question about Cars & Trucks
Engine light is on. bought a new gas cap and did not fix the problem
Posted by Anonymous on
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Posted on Jan 02, 2017
I would start with the gas cap replacement and see if the issue resolves itself. If you do have a problem with the EVAP (canister) system, it may require tools the average person does not have to help diagnose and correct/repair.
Posted on Jul 18, 2010
SOURCE: 2002 firebird evap system 0440
Are you using ethanol blended fuel? If so stop and use unleaded only and see if after 2 tanks you can clear the code. If that doesn't help and your evap canister has 2 hose connections, try plugging the hose connection that doesn't go to the tank at the first point of connection away from the canister. Plug the line that goes to the first point of connection side of that line (vacuum side). Let the canister side of that line vent to atmosphere during this test.
Posted on Sep 09, 2010
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