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My car is 1998 Toyota Sienna van. When I press the gas pedal I hear hissing sound. What

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Old 30 Jun 2010, 12:54 pm   #1 (permalink)
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Default My car is 1998 Toyota Sienna van. When I press the gas pedal I hear hissing sound. What
could be the cause? This doesn't happen everytime my foot is on the gas pedal but it makes me feel uncomfortable because I didn't hear this noise before.
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Old 30 Jun 2010, 12:58 pm   #2 (permalink)
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Check Your Vacuum Lines And Your throttle it is connected to a Air Duct see if that is leaking















it was like that one my car
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Old 30 Jun 2010, 01:00 pm   #3 (permalink)
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How does it run? Is it down on power? If so, you could have a restricted exhaust. See if you can rev the engine a little in park and see where the sound is coming from.
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