tokie Posted October 25, 2017 Share Posted October 25, 2017 On a 2004 Matrix XRS, what is the rectangular plastic box between the muffler and the gas tank? Mine partially broke when I hit something and now I have strange varying idle noises. The car still runs fine otherwise... Quote Link to comment Share on other sites More sharing options...
Toyota Owners Club Posted October 26, 2017 Share Posted October 26, 2017 Hi...welcome to the Forum It sounds like it could be a Fuel Vapour cannister (EVAP system) so if you are getting a smell of fuel and its affecting the idle speed then chances are that is what it is Worth dropping into a garage to confirm and let us know what you find Cheers, Trevor Quote Link to comment Share on other sites More sharing options...
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