sqa4life Posted August 16, 2011 Share Posted August 16, 2011 2006 Lexus IS350 105k miles I noticed a hiss coming from the engine when I step on the gas pedal @ slower speed. however, I don't hear the hiss if I go over 40mph. Am I the only who has this issue? What could goes wrong? Quote Link to comment Share on other sites More sharing options...
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